22156633572 has 12 divisors (see below), whose sum is σ = 51698811696. Its totient is φ = 7385544520.

The previous prime is 22156633559. The next prime is 22156633589. The reversal of 22156633572 is 27533665122.

It is a tau number, because it is divible by the number of its divisors (12).

It is a super-2 number, since 2×22156633572² (a number of 21 digits) contains 22 as substring.

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, 923193054 + ... + 923193077.

It is an arithmetic number, because the mean of its divisors is an integer number (4308234308).

Almost surely, 2^22156633572 is an apocalyptic number.

It is an amenable number.

22156633572 is an abundant number, since it is smaller than the sum of its proper divisors (29542178124).

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

22156633572 is a wasteful number, since it uses less digits than its factorization.

22156633572 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1846386138 (or 1846386136 counting only the distinct ones).

The product of its digits is 453600, while the sum is 42.

The spelling of 22156633572 in words is "twenty-two billion, one hundred fifty-six million, six hundred thirty-three thousand, five hundred seventy-two".