20964208 has 20 divisors (see below), whose sum is σ = 41015728. Its totient is φ = 10379520.

The previous prime is 20964197. The next prime is 20964221. The reversal of 20964208 is 80246902.

It is a self number, because there is not a number n which added to its sum of digits gives 20964208.

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, 4713 + ... + 8008.

Almost surely, 2^20964208 is an apocalyptic number.

It is an amenable number.

20964208 is a deficient number, since it is larger than the sum of its proper divisors (20051520).

20964208 is a wasteful number, since it uses less digits than its factorization.

20964208 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12832 (or 12826 counting only the distinct ones).

The product of its (nonzero) digits is 6912, while the sum is 31.

The square root of 20964208 is about 4578.6688021738. The cubic root of 20964208 is about 275.7355865772.

The spelling of 20964208 in words is "twenty million, nine hundred sixty-four thousand, two hundred eight".