21888804 has 24 divisors (see below), whose sum is σ = 58370368. Its totient is φ = 6253920.

The previous prime is 21888787. The next prime is 21888827. The reversal of 21888804 is 40888812.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 130207 + ... + 130374.

Almost surely, 2^21888804 is an apocalyptic number.

It is an amenable number.

21888804 is an abundant number, since it is smaller than the sum of its proper divisors (36481564).

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

21888804 is a wasteful number, since it uses less digits than its factorization.

21888804 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 260595 (or 260593 counting only the distinct ones).

The product of its (nonzero) digits is 32768, while the sum is 39.

The square root of 21888804 is about 4678.5472104062. The cubic root of 21888804 is about 279.7310512729.

The spelling of 21888804 in words is "twenty-one million, eight hundred eighty-eight thousand, eight hundred four".