20823796225 has 24 divisors (see below), whose sum is σ = 27189103040. Its totient is φ = 15777270720.

The previous prime is 20823796193. The next prime is 20823796303. The reversal of 20823796225 is 52269732802.

It is a happy number.

It is not a de Polignac number, because 20823796225 - 2⁵ = 20823796193 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2338732 + ... + 2347618.

Almost surely, 2^20823796225 is an apocalyptic number.

20823796225 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

20823796225 is a deficient number, since it is larger than the sum of its proper divisors (6365306815).

20823796225 is a wasteful number, since it uses less digits than its factorization.

20823796225 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13849 (or 13844 counting only the distinct ones).

The product of its (nonzero) digits is 725760, while the sum is 46.

The spelling of 20823796225 in words is "twenty billion, eight hundred twenty-three million, seven hundred ninety-six thousand, two hundred twenty-five".