22088891172 has 12 divisors (see below), whose sum is σ = 51540746096. Its totient is φ = 7362963720.

The previous prime is 22088891171. The next prime is 22088891189. The reversal of 22088891172 is 27119888022.

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

It is a super-2 number, since 2×22088891172² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (22088891171) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 920370454 + ... + 920370477.

Almost surely, 2^22088891172 is an apocalyptic number.

It is an amenable number.

22088891172 is an abundant number, since it is smaller than the sum of its proper divisors (29451854924).

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

22088891172 is a wasteful number, since it uses less digits than its factorization.

22088891172 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1840740938 (or 1840740936 counting only the distinct ones).

The product of its (nonzero) digits is 258048, while the sum is 48.

The spelling of 22088891172 in words is "twenty-two billion, eighty-eight million, eight hundred ninety-one thousand, one hundred seventy-two".