21930952 has 48 divisors (see below), whose sum is σ = 45094860. Its totient is φ = 9962496.

The previous prime is 21930917. The next prime is 21930991. The reversal of 21930952 is 25903912.

It can be written as a sum of positive squares in 2 ways, for example, as 21215236 + 715716 = 4606^2 + 846^2 .

It is a hoax number, since the sum of its digits (31) coincides with the sum of the digits of its distinct prime factors.

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, 300388 + ... + 300460.

Almost surely, 2^21930952 is an apocalyptic number.

It is an amenable number.

21930952 is an abundant number, since it is smaller than the sum of its proper divisors (23163908).

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

21930952 is a wasteful number, since it uses less digits than its factorization.

21930952 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 190 (or 139 counting only the distinct ones).

The product of its (nonzero) digits is 4860, while the sum is 31.

The square root of 21930952 is about 4683.0494338625. The cubic root of 21930952 is about 279.9104815873.

The spelling of 21930952 in words is "twenty-one million, nine hundred thirty thousand, nine hundred fifty-two".