20810572 has 6 divisors (see below), whose sum is σ = 36418508. Its totient is φ = 10405284.

The previous prime is 20810563. The next prime is 20810599. The reversal of 20810572 is 27501802.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2601318 + ... + 2601325.

Almost surely, 2^20810572 is an apocalyptic number.

It is an amenable number.

20810572 is a deficient number, since it is larger than the sum of its proper divisors (15607936).

20810572 is a wasteful number, since it uses less digits than its factorization.

20810572 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5202647 (or 5202645 counting only the distinct ones).

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

The square root of 20810572 is about 4561.8605853314. The cubic root of 20810572 is about 275.0603592027.

The spelling of 20810572 in words is "twenty million, eight hundred ten thousand, five hundred seventy-two".