20972762154 has 24 divisors (see below), whose sum is σ = 46407816000. Its totient is φ = 6842177448.

The previous prime is 20972762143. The next prime is 20972762179. The reversal of 20972762154 is 45126727902.

20972762154 is digitally balanced in base 5, because in such base it contains all the possibile digits an equal number of times.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 12394404 + ... + 12396095.

It is an arithmetic number, because the mean of its divisors is an integer number (1933659000).

Almost surely, 2^20972762154 is an apocalyptic number.

20972762154 is an abundant number, since it is smaller than the sum of its proper divisors (25435053846).

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

20972762154 is a wasteful number, since it uses less digits than its factorization.

20972762154 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24790554 (or 24790551 counting only the distinct ones).

The product of its (nonzero) digits is 423360, while the sum is 45.

It can be divided in two parts, 20972 and 762154, that added together give a triangular number (783126 = T₁₂₅₁).

The spelling of 20972762154 in words is "twenty billion, nine hundred seventy-two million, seven hundred sixty-two thousand, one hundred fifty-four".