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This article is about the number 23. For the year, see 23. This article is about the year AD 23 For other uses see 23 (number, 23 (numerology, or 23 (disambiguation. For the movie, see 23 (film). 23 is a 1998 German movie about a young hacker Karl Koch, who supposedly committed suicide on May 23, 1989. For other uses, see 23 (disambiguation)
23

0 10 20 30 40 50 60 70 80 90

Cardinal twenty-three
Ordinal 23rd
(twenty-third)
Factorization prime
Divisor(s) 1, 23
Roman numeral XXIII
Binary 10111
Octal 27
Hexadecimal 17

23 (twenty-three) is the natural number following 22 and preceding 24. 23 is a number but may also refer to ''23'' (film, a 1998 German film The Number 23, a 2007 film starring Jim Carrey 22 ( twenty-two) is the Natural number following 21 and preceding 23. 24 ( twenty-four) is the Natural number following 23 and preceding 25. 19 ( nineteen) is the Natural number following 18 and preceding 20. "Twenty" redirects here For the village in England, see Twenty Lincolnshire. 21 ( twenty-one) is the Natural number following 20 and preceding 22. 22 ( twenty-two) is the Natural number following 21 and preceding 23. 24 ( twenty-four) is the Natural number following 23 and preceding 25. 25 ( twenty-five) is the Natural number following 24 and preceding 26. 26 ( twenty-six) is the Natural number following 25 and preceding 27. 27 ( twenty-seven) is the Natural number following 26 and preceding 28. 28 ( twenty-eight) is the Natural number following 27 and preceding 29. 29 ( twenty-nine) is the Natural number following 28 and preceding 30. 30 ( thirty) is the Natural number following 29 and preceding 31. This is a list of articles about Numbers ( not about Numerals. The integers (from the Latin integer, literally "untouched" hence "whole" the word entire comes from the same origin but via French "Twenty" redirects here For the village in England, see Twenty Lincolnshire. 30 ( thirty) is the Natural number following 29 and preceding 31. 40 ( forty) is the Natural number following 39 and preceding 41. This article discusses the number fifty. For the year 50 CE see 50. 60 ( sixty) is the Natural number following 59 and preceding 61. 70 ( seventy) is the Natural number following 69 and preceding 71. 80 ( eighty) is the Natural number following 79 and preceding 81. 90 ( ninety) is the Natural number preceded by 89 and followed by 91. This article describes cardinal numbers in mathematics For cardinals in linguistics see Names of numbers in English. In linguistics ordinal numbers are the words representing the rank of a number with respect to some order in particular order or position (i In Mathematics, factorization ( also factorisation in British English) or factoring is the decomposition of an object (for In Mathematics, a prime number (or a prime) is a Natural number which has exactly two distinct natural number Divisors 1 In Mathematics, a divisor of an Integer n, also called a factor of n, is an integer which evenly divides n without Roman numerals are a Numeral system originating in ancient Rome, adapted from Etruscan numerals. The binary numeral system, or base-2 number system, is a Numeral system that represents numeric values using two symbols usually 0 and 1. The octal Numeral system, or oct for short is the base -8 number system and uses the digits 0 to 7 In Mathematics and Computer science, hexadecimal (also base -, hexa, or hex) is a Numeral system with a In Mathematics, a natural number (also called counting number) can mean either an element of the set (the positive Integers or an 22 ( twenty-two) is the Natural number following 21 and preceding 23. 24 ( twenty-four) is the Natural number following 23 and preceding 25.

Contents

In mathematics

Twenty-three is the ninth prime number, the smallest odd prime which is not a twin prime. In Mathematics, a prime number (or a prime) is a Natural number which has exactly two distinct natural number Divisors 1 A twin prime is a Prime number that differs from another prime number by Two. Twenty-three is also the fifth factorial prime, the second Woodall prime. A factorial prime is a Prime number that is one less or one more than a Factorial (all factorials above 1 are even In Mathematics, a Woodall number is a Natural number of the form n · 2 n  &minus 1 (written W n It is an Eisenstein prime with no imaginary part and real part of the form 3n − 1. In Mathematics, an Eisenstein prime is an Eisenstein integer z = a + b\\omega\qquad(\omega = e^{2\pi i/3} that is irreducible In base 10, it is the second Smarandache-Wellin prime, as it is the concatenation of the base 10 representations of the first two primes (2 and 3) and is itself also prime. In Mathematics, a Smarandache-Wellin number is an Integer that in a given base is the Concatenation of the first n Prime numbers written

The fifth Sophie Germain prime and the fourth safe prime, 23 is the next to last member of the first Cunningham chain of the first kind to have five terms (2, 5, 11, 23, 47). In Number theory, a Prime number p is a Sophie Germain prime if 2 p  + 1 is also prime A safe prime is a Prime number of the form 2 p + 1 where p is also a prime In Mathematics, a Cunningham chain is a certain sequence of Prime numbers Cunningham chains are named after Mathematician A Since 14 + 1 is a multiple of 23 but 23 is not one more than a multiple 14, 23 is a Pillai prime. A Pillai prime is a Prime number p for which there is an integer n > 0 such that the Factorial of n is one less than a multiple of 23 is the smallest odd prime to be a highly cototient number, as the solution to x - φ(x) for the integers 95, 119, 143, 529. In Number theory, a branch of Mathematics, a highly cototient number is a positive Integer k which is above one and has more solutions to the

In the list of Fortunate numbers, 23 occurs twice, since adding 23 to either the fifth or eighth primorial gives a prime number (namely 2333 and 9699713). A Fortunate number, named after Reo Fortune, for a given positive Integer n is the smallest integer m > 1 such that p n The primorial has two similar but distinct meanings The name is attributed to Harvey Dubner and is a Portmanteau of prime and Factorial

23 also has the distinction of being one of two integers that cannot be expressed as the sum of fewer than 9 cubes of integers (the other is 239). See Waring's problem. In Number theory, Waring's problem, proposed in 1770 by Edward Waring, asks whether for every Natural number k there exists an associated positive

23 is a Wedderburn-Etherington number and the sixth happy number. In Graph theory, the Wedderburn-Etherington numbers count how many weakly Binary trees can be constructed that is the number of trees for which each graph vertex A happy number is defined by the following process Starting with any positive Integer, replace the number by the Sum of the squares of its digits The codewords in the perfect (non-extended) binary Golay code are of size 23. In Mathematics and Computer science, a binary Golay code is a type of Error-correcting code used in Digital communications The binary Golay code

23 is the first prime P for which unique factorization of cyclotomic integers based on the P'th root of unity breaks down.

According to the birthday paradox, in a group of 23 (or more) randomly chosen people, the probability is more than 50% that some pair of them will have the same birthday. In Probability theory, the birthday problem, pertains to the Probability that in a set of Randomly chosen people some pair of them will have the same

There were 23 problems on David Hilbert's famous list of unsolved mathematical problems, presented to the International Congress of Mathematicians in Paris in 1900. David Hilbert ( January 23, 1862 &ndash February 14, 1943) was a German Mathematician, recognized as one of the most The International Congress of Mathematicians (ICM is the largest congress in the Mathematics community

23! is 23 digits long in base 10. Definition The factorial function is formally defined by n!=\prod_{k=1}^n k There are only three other numbers that have this property: 1, 22, and 24.

In science

In technology

23 is the TCP/IP port used for telnet and is the default for the telnet command. The Internet Protocol Suite (commonly TCP/IP) is the set of Communications protocols used for the Internet and other similar networks Telnet ( Tel ecommunication net work is a Network protocol used on the Internet or local area network (LAN connections

In religion

In sports

Michael Jordan, a star basketball player for the NBA, wore the number 23 on his jersey.
Michael Jordan, a star basketball player for the NBA, wore the number 23 on his jersey. Michael Jeffrey Jordan (born February 17 1963 is a retired American professional Basketball player and active businessman

In music

The doorway David Bowie stands in on the Ziggy Stardust album is number 23.

In film and television

In other fields

References

  1. ^ Living Religions: An Encyclopaedia of the World's Faiths, Mary Pat Fisher, 1997, page 338, I. B. Tauris Publishers,
  2. ^ Qur'an, Chapter 17, Verse 106

External links


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