20570812 has 12 divisors (see below), whose sum is σ = 36171016. Its totient is φ = 10236240.

The previous prime is 20570789. The next prime is 20570821. The reversal of 20570812 is 21807502.

It is a hoax number, since the sum of its digits (25) coincides with the sum of the digits of its distinct prime factors.

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, 11343 + ... + 13030.

Almost surely, 2^20570812 is an apocalyptic number.

It is an amenable number.

20570812 is a deficient number, since it is larger than the sum of its proper divisors (15600204).

20570812 is a wasteful number, since it uses less digits than its factorization.

20570812 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24588 (or 24586 counting only the distinct ones).

The product of its (nonzero) digits is 1120, while the sum is 25.

The square root of 20570812 is about 4535.5057049903. The cubic root of 20570812 is about 273.9999467206. Note that the first 4 decimals are identical.

It can be divided in two parts, 205 and 70812, that added together give a palindrome (71017).

The spelling of 20570812 in words is "twenty million, five hundred seventy thousand, eight hundred twelve".