20936768 has 28 divisors (see below), whose sum is σ = 41731692. Its totient is φ = 10421760.

The previous prime is 20936759. The next prime is 20936779. The reversal of 20936768 is 86763902.

It can be written as a sum of positive squares in 2 ways, for example, as 11888704 + 9048064 = 3448^2 + 3008^2 .

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, 17138 + ... + 18318.

Almost surely, 2^20936768 is an apocalyptic number.

It is an amenable number.

20936768 is a deficient number, since it is larger than the sum of its proper divisors (20794924).

20936768 is a wasteful number, since it uses less digits than its factorization.

20936768 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1470 (or 1460 counting only the distinct ones).

The product of its (nonzero) digits is 108864, while the sum is 41.

The square root of 20936768 is about 4575.6713168671. The cubic root of 20936768 is about 275.6152308417.

The spelling of 20936768 in words is "twenty million, nine hundred thirty-six thousand, seven hundred sixty-eight".