23 (number)

Time you got around to sponsoring a child

23 (twenty-three) is the natural number following 22 and preceding 24.

List of numbers — Integers

<< 20 21 22 23 24 25 26 27 28 29 >>

Cardinal twenty-three
Ordinal twenty-third
Factorization prime
Roman numeral XXIII
Binary 10111
Hexadecimal 17

In mathematics

Twenty-three is the ninth prime number, the sequence continues 29, 31, 37, 41,... Twenty-three is also a factorial prime, a Sophie Germain prime, a Woodall prime, and a Smarandache-Wellin prime.

23 also has the distinction of being one of two integers that can't be expressed as the sum of 8 cubes (we allow 0^3 since zero is indeed an integer). The other integer is 239.

In other fields

The 23rd moon of Jupiter is Carme.

Twenty-three is:

The atomic number of vanadium.
In early 20th century United States slang, it meant to leave a place. (From the phrase twenty-three skiddoo, which was a reference to Charles Dickens' novel A Tale of Two Cities, in which the hero Sydney Carlton was the twenty-third victim of the guillotine that day).
The sacred number (along with 17 and 5) of Eris, Goddess of Discord from the Principia Discordia; it is the number of the Illuminati.
Like 13, sometimes considered unlucky or otherwise significant (as in the occult writings of Aleister Crowley and William S. Burroughs).
23, a German movie about Karl Koch.
A telegraphers' code meaning "line break".
Michael Jordan's jersey number when he played for the Chicago Bulls
When mathematician John Forbes Nash suffered from schizophrenic delusions, he said that Life Magazine had run a cover story of him disguised as Pope John XXIII as his name was John and his favorite prime number was 23.
Historical years: 23 A.D., 23 B.C, or 1923