21900792 has 16 divisors (see below), whose sum is σ = 54752040. Its totient is φ = 7300256.

The previous prime is 21900773. The next prime is 21900793. The reversal of 21900792 is 29700912.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21900793) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 456243 + ... + 456290.

Almost surely, 2^21900792 is an apocalyptic number.

It is an amenable number.

21900792 is an abundant number, since it is smaller than the sum of its proper divisors (32851248).

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

21900792 is a wasteful number, since it uses less digits than its factorization.

21900792 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 912542 (or 912538 counting only the distinct ones).

The product of its (nonzero) digits is 2268, while the sum is 30.

The square root of 21900792 is about 4679.8282019749. The cubic root of 21900792 is about 279.7821093973.

The spelling of 21900792 in words is "twenty-one million, nine hundred thousand, seven hundred ninety-two".