Twenty-four (24) is a positive integer one more than 23 and preceding 25.

## Properties Edit

24 is an even composite number and the fourth factorial number.

24 is equal to 8!!!!!, the quintuple factorial of 8.

There are 24 hours in a day.

The 24th of December is known around the world as Christmas eve.

## In googology Edit

Furthermore, it is the largest number *n* with the following property: Let *f*: ℕ → ℕ, *f*(*a*) = *a*^{a}. Then for every *a* ∈ ℕ, there is a *b* ∈ ℕ, such that *f*^{b+1}(*a*) ≡ *f*^{b}(*a*) (mod *n*).

Jim Blowers calls this number **foxclamation**.

Community content is available under CC-BY-SA
unless otherwise noted.