20982664 has 16 divisors (see below), whose sum is σ = 39586320. Its totient is φ = 10426320.

The previous prime is 20982659. The next prime is 20982677. The reversal of 20982664 is 46628902.

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, 6742 + ... + 9349.

It is an arithmetic number, because the mean of its divisors is an integer number (2474145).

Almost surely, 2^20982664 is an apocalyptic number.

It is an amenable number.

20982664 is a deficient number, since it is larger than the sum of its proper divisors (18603656).

20982664 is a wasteful number, since it uses less digits than its factorization.

20982664 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16260 (or 16256 counting only the distinct ones).

The product of its (nonzero) digits is 41472, while the sum is 37.

The square root of 20982664 is about 4580.6837917499. The cubic root of 20982664 is about 275.8164781511.

The spelling of 20982664 in words is "twenty million, nine hundred eighty-two thousand, six hundred sixty-four".