22971721472 has 36 divisors (see below), whose sum is σ = 52404243696. Its totient is φ = 9845022720.

The previous prime is 22971721459. The next prime is 22971721481. The reversal of 22971721472 is 27412717922.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6407729 + ... + 6411312.

It is an arithmetic number, because the mean of its divisors is an integer number (1455673436).

Almost surely, 2^22971721472 is an apocalyptic number.

It is an amenable number.

22971721472 is an abundant number, since it is smaller than the sum of its proper divisors (29432522224).

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

22971721472 is an equidigital number, since it uses as much as digits as its factorization.

22971721472 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12819064 (or 12819050 counting only the distinct ones).

The product of its digits is 197568, while the sum is 44.

The spelling of 22971721472 in words is "twenty-two billion, nine hundred seventy-one million, seven hundred twenty-one thousand, four hundred seventy-two".