20972371008 has 56 divisors (see below), whose sum is σ = 55727669088. Its totient is φ = 6960772096.

The previous prime is 20972370971. The next prime is 20972371009. The reversal of 20972371008 is 80017327902.

It is not an unprimeable number, because it can be changed into a prime (20972371009) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 189666 + ... + 279137.

It is an arithmetic number, because the mean of its divisors is an integer number (995136948).

Almost surely, 2^20972371008 is an apocalyptic number.

It is an amenable number.

20972371008 is an abundant number, since it is smaller than the sum of its proper divisors (34755298080).

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

20972371008 is a wasteful number, since it uses less digits than its factorization.

20972371008 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 469051 (or 469041 counting only the distinct ones).

The product of its (nonzero) digits is 42336, while the sum is 39.

The spelling of 20972371008 in words is "twenty billion, nine hundred seventy-two million, three hundred seventy-one thousand, eight".