21882572 has 6 divisors (see below), whose sum is σ = 38294508. Its totient is φ = 10941284.

The previous prime is 21882557. The next prime is 21882593. The reversal of 21882572 is 27528812.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2735318 + ... + 2735325.

It is an arithmetic number, because the mean of its divisors is an integer number (6382418).

Almost surely, 2^21882572 is an apocalyptic number.

It is an amenable number.

21882572 is a deficient number, since it is larger than the sum of its proper divisors (16411936).

21882572 is a wasteful number, since it uses less digits than its factorization.

21882572 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5470647 (or 5470645 counting only the distinct ones).

The product of its digits is 17920, while the sum is 35.

The square root of 21882572 is about 4677.8811442789. The cubic root of 21882572 is about 279.7045011793.

The spelling of 21882572 in words is "twenty-one million, eight hundred eighty-two thousand, five hundred seventy-two".