20864682 has 16 divisors (see below), whose sum is σ = 46366080. Its totient is φ = 6954876.

The previous prime is 20864677. The next prime is 20864693. The reversal of 20864682 is 28646802.

20864682 is a `hidden beast` number, since 2 + 0 + 8 + 646 + 8 + 2 = 666.

It is a super-2 number, since 2×20864682² = 870669909922248, which contains 22 as substring.

It is a hoax number, since the sum of its digits (36) coincides with the sum of the digits of its distinct prime factors.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 193138 + ... + 193245.

It is an arithmetic number, because the mean of its divisors is an integer number (2897880).

Almost surely, 2^20864682 is an apocalyptic number.

20864682 is an abundant number, since it is smaller than the sum of its proper divisors (25501398).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20864682 is a wasteful number, since it uses less digits than its factorization.

20864682 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 386394 (or 386388 counting only the distinct ones).

The product of its (nonzero) digits is 36864, while the sum is 36.

The square root of 20864682 is about 4567.7874293798. The cubic root of 20864682 is about 275.2985495961.

The spelling of 20864682 in words is "twenty million, eight hundred sixty-four thousand, six hundred eighty-two".