21932392 has 16 divisors (see below), whose sum is σ = 41448960. Its totient is φ = 10879344.

The previous prime is 21932389. The next prime is 21932401. The reversal of 21932392 is 29323912.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9778 + ... + 11809.

It is an arithmetic number, because the mean of its divisors is an integer number (2590560).

Almost surely, 2^21932392 is an apocalyptic number.

It is an amenable number.

21932392 is a deficient number, since it is larger than the sum of its proper divisors (19516568).

21932392 is a wasteful number, since it uses less digits than its factorization.

21932392 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21720 (or 21716 counting only the distinct ones).

The product of its digits is 5832, while the sum is 31.

The square root of 21932392 is about 4683.2031773136. The cubic root of 21932392 is about 279.9166078189.

The spelling of 21932392 in words is "twenty-one million, nine hundred thirty-two thousand, three hundred ninety-two".