20972315280 has 80 divisors (see below), whose sum is σ = 74301922944. Its totient is φ = 4793671680.

The previous prime is 20972315257. The next prime is 20972315297. The reversal of 20972315280 is 8251327902.

It is a tau number, because it is divible by the number of its divisors (80).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6240081 + ... + 6243440.

Almost surely, 2^20972315280 is an apocalyptic number.

20972315280 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20972315280 is an abundant number, since it is smaller than the sum of its proper divisors (53329607664).

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

20972315280 is a wasteful number, since it uses less digits than its factorization.

20972315280 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12483544 (or 12483538 counting only the distinct ones).

The product of its (nonzero) digits is 60480, while the sum is 39.

The spelling of 20972315280 in words is "twenty billion, nine hundred seventy-two million, three hundred fifteen thousand, two hundred eighty".