21884792 has 16 divisors (see below), whose sum is σ = 42449400. Its totient is φ = 10564960.

The previous prime is 21884783. The next prime is 21884809. The reversal of 21884792 is 29748812.

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, 46934 + ... + 47397.

Almost surely, 2^21884792 is an apocalyptic number.

It is an amenable number.

21884792 is a deficient number, since it is larger than the sum of its proper divisors (20564608).

21884792 is a wasteful number, since it uses less digits than its factorization.

21884792 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 94366 (or 94362 counting only the distinct ones).

The product of its digits is 64512, while the sum is 41.

The square root of 21884792 is about 4678.1184251791. The cubic root of 21884792 is about 279.7139595891.

The spelling of 21884792 in words is "twenty-one million, eight hundred eighty-four thousand, seven hundred ninety-two".