21570968 has 16 divisors (see below), whose sum is σ = 40522680. Its totient is φ = 10764928.

The previous prime is 21570929. The next prime is 21571001. The reversal of 21570968 is 86907512.

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, 2471 + ... + 7017.

Almost surely, 2^21570968 is an apocalyptic number.

It is an amenable number.

21570968 is a deficient number, since it is larger than the sum of its proper divisors (18951712).

21570968 is a wasteful number, since it uses less digits than its factorization.

21570968 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5146 (or 5142 counting only the distinct ones).

The product of its (nonzero) digits is 30240, while the sum is 38.

The square root of 21570968 is about 4644.4556193380. The cubic root of 21570968 is about 278.3705012894.

The spelling of 21570968 in words is "twenty-one million, five hundred seventy thousand, nine hundred sixty-eight".