20570868 has 24 divisors (see below), whose sum is σ = 53332160. Its totient is φ = 6856920.

The previous prime is 20570861. The next prime is 20570903. The reversal of 20570868 is 86807502.

20570868 is a `hidden beast` number, since 2 + 0 + 570 + 86 + 8 = 666.

It is a super-2 number, since 2×20570868² = 846321220546848, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20570861) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 95128 + ... + 95343.

Almost surely, 2^20570868 is an apocalyptic number.

It is an amenable number.

20570868 is an abundant number, since it is smaller than the sum of its proper divisors (32761292).

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

20570868 is a wasteful number, since it uses less digits than its factorization.

20570868 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 190484 (or 190476 counting only the distinct ones).

The product of its (nonzero) digits is 26880, while the sum is 36.

The square root of 20570868 is about 4535.5118784984. The cubic root of 20570868 is about 274.0001953575. Note that the first 3 decimals are identical.

The spelling of 20570868 in words is "twenty million, five hundred seventy thousand, eight hundred sixty-eight".