21052932 has 12 divisors (see below), whose sum is σ = 49123536. Its totient is φ = 7017640.

The previous prime is 21052909. The next prime is 21052943. The reversal of 21052932 is 23925012.

It is a tau number, because it is divible by the number of its divisors (12).

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, 877194 + ... + 877217.

It is an arithmetic number, because the mean of its divisors is an integer number (4093628).

Almost surely, 2^21052932 is an apocalyptic number.

It is an amenable number.

21052932 is an abundant number, since it is smaller than the sum of its proper divisors (28070604).

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

21052932 is a wasteful number, since it uses less digits than its factorization.

21052932 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1754418 (or 1754416 counting only the distinct ones).

The product of its (nonzero) digits is 1080, while the sum is 24.

The square root of 21052932 is about 4588.3474149197. The cubic root of 21052932 is about 276.1240253341.

Adding to 21052932 its reverse (23925012), we get a palindrome (44977944).

The spelling of 21052932 in words is "twenty-one million, fifty-two thousand, nine hundred thirty-two".