22921156272 has 160 divisors (see below), whose sum is σ = 70799468544. Its totient is φ = 6253056000.

The previous prime is 22921156261. The next prime is 22921156273. The reversal of 22921156272 is 27265112922.

It is a self number, because there is not a number n which added to its sum of digits gives 22921156272.

It is not an unprimeable number, because it can be changed into a prime (22921156273) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 629772 + ... + 665172.

Almost surely, 2^22921156272 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 22921156272, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (35399734272).

22921156272 is an abundant number, since it is smaller than the sum of its proper divisors (47878312272).

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

22921156272 is a wasteful number, since it uses less digits than its factorization.

22921156272 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35507 (or 35501 counting only the distinct ones).

The product of its digits is 60480, while the sum is 39.

The spelling of 22921156272 in words is "twenty-two billion, nine hundred twenty-one million, one hundred fifty-six thousand, two hundred seventy-two".