22156437512 has 32 divisors (see below), whose sum is σ = 45487267200. Its totient is φ = 10033934400.

The previous prime is 22156437497. The next prime is 22156437553. The reversal of 22156437512 is 21573465122.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 440687 + ... + 488382.

It is an arithmetic number, because the mean of its divisors is an integer number (1421477100).

Almost surely, 2^22156437512 is an apocalyptic number.

22156437512 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

22156437512 is an abundant number, since it is smaller than the sum of its proper divisors (23330829688).

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

22156437512 is a wasteful number, since it uses less digits than its factorization.

22156437512 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 929357 (or 929353 counting only the distinct ones).

The product of its digits is 100800, while the sum is 38.

The spelling of 22156437512 in words is "twenty-two billion, one hundred fifty-six million, four hundred thirty-seven thousand, five hundred twelve".