20975716 has 12 divisors (see below), whose sum is σ = 37891840. Its totient is φ = 10149480.

The previous prime is 20975711. The next prime is 20975719. The reversal of 20975716 is 61757902.

It is a hoax number, since the sum of its digits (37) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (20975711) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 84456 + ... + 84703.

Almost surely, 2^20975716 is an apocalyptic number.

It is an amenable number.

20975716 is a deficient number, since it is larger than the sum of its proper divisors (16916124).

20975716 is a wasteful number, since it uses less digits than its factorization.

20975716 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 169194 (or 169192 counting only the distinct ones).

The product of its (nonzero) digits is 26460, while the sum is 37.

The square root of 20975716 is about 4579.9253269022. The cubic root of 20975716 is about 275.7860310409.

The spelling of 20975716 in words is "twenty million, nine hundred seventy-five thousand, seven hundred sixteen".