21932872 has 32 divisors (see below), whose sum is σ = 45722880. Its totient is φ = 9794880.

The previous prime is 21932861. The next prime is 21932887. The reversal of 21932872 is 27823912.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 178 + ... + 6625.

It is an arithmetic number, because the mean of its divisors is an integer number (1428840).

Almost surely, 2^21932872 is an apocalyptic number.

It is an amenable number.

21932872 is an abundant number, since it is smaller than the sum of its proper divisors (23790008).

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

21932872 is a wasteful number, since it uses less digits than its factorization.

21932872 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6853 (or 6849 counting only the distinct ones).

The product of its digits is 12096, while the sum is 34.

The square root of 21932872 is about 4683.2544240090. The cubic root of 21932872 is about 279.9186498365.

The spelling of 21932872 in words is "twenty-one million, nine hundred thirty-two thousand, eight hundred seventy-two".