20972505960 has 128 divisors (see below), whose sum is σ = 79895289600. Its totient is φ = 4793713920.

The previous prime is 20972505949. The next prime is 20972505973. The reversal of 20972505960 is 6950527902.

20972505960 is a `hidden beast` number, since 2 + 0 + 9 + 7 + 2 + 50 + 596 + 0 = 666.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1379511 + ... + 1394630.

It is an arithmetic number, because the mean of its divisors is an integer number (624181950).

Almost surely, 2^20972505960 is an apocalyptic number.

20972505960 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20972505960 is an abundant number, since it is smaller than the sum of its proper divisors (58922783640).

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

20972505960 is a wasteful number, since it uses less digits than its factorization.

20972505960 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2774168 (or 2774158 counting only the distinct ones).

The product of its (nonzero) digits is 340200, while the sum is 45.

The spelling of 20972505960 in words is "twenty billion, nine hundred seventy-two million, five hundred five thousand, nine hundred sixty".