21623056924 has 36 divisors (see below), whose sum is σ = 44060277240. Its totient is φ = 9258201120.

The previous prime is 21623056877. The next prime is 21623056981. The reversal of 21623056924 is 42965032612.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 155967 + ... + 259945.

It is an arithmetic number, because the mean of its divisors is an integer number (1223896590).

Almost surely, 2^21623056924 is an apocalyptic number.

It is an amenable number.

21623056924 is an abundant number, since it is smaller than the sum of its proper divisors (22437220316).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21623056924 is a wasteful number, since it uses less digits than its factorization.

21623056924 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 105058 (or 105049 counting only the distinct ones).

The product of its (nonzero) digits is 155520, while the sum is 40.

The spelling of 21623056924 in words is "twenty-one billion, six hundred twenty-three million, fifty-six thousand, nine hundred twenty-four".