21922723572 has 24 divisors (see below), whose sum is σ = 51155608896. Its totient is φ = 7307204928.

The previous prime is 21922723549. The next prime is 21922723573. The reversal of 21922723572 is 27532722912.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21922723573) 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, 312088 + ... + 375824.

It is an arithmetic number, because the mean of its divisors is an integer number (2131483704).

Almost surely, 2^21922723572 is an apocalyptic number.

It is an amenable number.

21922723572 is an abundant number, since it is smaller than the sum of its proper divisors (29232885324).

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

21922723572 is a wasteful number, since it uses less digits than its factorization.

21922723572 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 92407 (or 92405 counting only the distinct ones).

The product of its digits is 211680, while the sum is 42.

The spelling of 21922723572 in words is "twenty-one billion, nine hundred twenty-two million, seven hundred twenty-three thousand, five hundred seventy-two".