20117722472 has 48 divisors (see below), whose sum is σ = 39271247340. Its totient is φ = 9661059072.

The previous prime is 20117722439. The next prime is 20117722477. The reversal of 20117722472 is 27422771102.

It can be written as a sum of positive squares in 6 ways, for example, as 2905856836 + 17211865636 = 53906^2 + 131194^2 .

It is not an unprimeable number, because it can be changed into a prime (20117722477) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1290758 + ... + 1306250.

Almost surely, 2^20117722472 is an apocalyptic number.

It is an amenable number.

20117722472 is a deficient number, since it is larger than the sum of its proper divisors (19153524868).

20117722472 is a wasteful number, since it uses less digits than its factorization.

20117722472 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15750 (or 15717 counting only the distinct ones).

The product of its (nonzero) digits is 21952, while the sum is 35.

The spelling of 20117722472 in words is "twenty billion, one hundred seventeen million, seven hundred twenty-two thousand, four hundred seventy-two".