21883384 has 16 divisors (see below), whose sum is σ = 41704920. Its totient is φ = 10762080.

The previous prime is 21883363. The next prime is 21883397. The reversal of 21883384 is 48338812.

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, 21934 + ... + 22909.

Almost surely, 2^21883384 is an apocalyptic number.

It is an amenable number.

21883384 is a deficient number, since it is larger than the sum of its proper divisors (19821536).

21883384 is a wasteful number, since it uses less digits than its factorization.

21883384 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 44910 (or 44906 counting only the distinct ones).

The product of its digits is 36864, while the sum is 37.

The square root of 21883384 is about 4677.9679349051. The cubic root of 21883384 is about 279.7079608160.

The spelling of 21883384 in words is "twenty-one million, eight hundred eighty-three thousand, three hundred eighty-four".