20972976 has 40 divisors (see below), whose sum is σ = 55506864. Its totient is φ = 6819840.

The previous prime is 20972933. The next prime is 20972977. The reversal of 20972976 is 67927902.

It is not an unprimeable number, because it can be changed into a prime (20972977) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3361 + ... + 7296.

Almost surely, 2^20972976 is an apocalyptic number.

It is an amenable number.

20972976 is an abundant number, since it is smaller than the sum of its proper divisors (34533888).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20972976 is a wasteful number, since it uses less digits than its factorization.

20972976 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10709 (or 10703 counting only the distinct ones).

The product of its (nonzero) digits is 95256, while the sum is 42.

The square root of 20972976 is about 4579.6261856182. The cubic root of 20972976 is about 275.7740221281.

The spelling of 20972976 in words is "twenty million, nine hundred seventy-two thousand, nine hundred seventy-six".