22172990637 has 24 divisors (see below), whose sum is σ = 34404422976. Its totient is φ = 12665247168.

The previous prime is 22172990563. The next prime is 22172990647. The reversal of 22172990637 is 73609927122.

It is not a de Polignac number, because 22172990637 - 2⁷ = 22172990509 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22172990647) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 358408 + ... + 415694.

It is an arithmetic number, because the mean of its divisors is an integer number (1433517624).

Almost surely, 2^22172990637 is an apocalyptic number.

It is an amenable number.

22172990637 is a deficient number, since it is larger than the sum of its proper divisors (12231432339).

22172990637 is a wasteful number, since it uses less digits than its factorization.

22172990637 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 59937 (or 59930 counting only the distinct ones).

The product of its (nonzero) digits is 571536, while the sum is 48.

The spelling of 22172990637 in words is "twenty-two billion, one hundred seventy-two million, nine hundred ninety thousand, six hundred thirty-seven".