20620648 has 16 divisors (see below), whose sum is σ = 39063780. Its totient is φ = 10203648.

The previous prime is 20620637. The next prime is 20620651. The reversal of 20620648 is 84602602.

It can be written as a sum of positive squares in 2 ways, for example, as 18130564 + 2490084 = 4258^2 + 1578^2 .

It is a super-2 number, since 2×20620648² = 850422247879808, which contains 22 as substring.

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, 12511 + ... + 14062.

Almost surely, 2^20620648 is an apocalyptic number.

It is an amenable number.

20620648 is a deficient number, since it is larger than the sum of its proper divisors (18443132).

20620648 is a wasteful number, since it uses less digits than its factorization.

20620648 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26676 (or 26672 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 28.

The square root of 20620648 is about 4540.9963664377. The cubic root of 20620648 is about 274.2210374744.

The spelling of 20620648 in words is "twenty million, six hundred twenty thousand, six hundred forty-eight".