21052792 has 16 divisors (see below), whose sum is σ = 39542040. Its totient is φ = 10508256.

The previous prime is 21052771. The next prime is 21052841. The reversal of 21052792 is 29725012.

It is a self number, because there is not a number n which added to its sum of digits gives 21052792.

It is a congruent 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, 3538 + ... + 7390.

Almost surely, 2^21052792 is an apocalyptic number.

It is an amenable number.

21052792 is a deficient number, since it is larger than the sum of its proper divisors (18489248).

21052792 is a wasteful number, since it uses less digits than its factorization.

21052792 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4542 (or 4538 counting only the distinct ones).

The product of its (nonzero) digits is 2520, while the sum is 28.

The square root of 21052792 is about 4588.3321588569. The cubic root of 21052792 is about 276.1234132666.

The spelling of 21052792 in words is "twenty-one million, fifty-two thousand, seven hundred ninety-two".