22525917988 has 18 divisors (see below), whose sum is σ = 45856333446. Its totient is φ = 9653964768.

The previous prime is 22525917971. The next prime is 22525918031. The reversal of 22525917988 is 88971952522.

It can be written as a sum of positive squares in only one way, i.e., 21823561984 + 702356004 = 147728^2 + 26502^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 57463881 + ... + 57464272.

Almost surely, 2^22525917988 is an apocalyptic number.

22525917988 is a gapful number since it is divisible by the number (28) formed by its first and last digit.

It is an amenable number.

22525917988 is an abundant number, since it is smaller than the sum of its proper divisors (23330415458).

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

22525917988 is a wasteful number, since it uses less digits than its factorization.

22525917988 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 114928171 (or 114928162 counting only the distinct ones).

The product of its digits is 7257600, while the sum is 58.

The spelling of 22525917988 in words is "twenty-two billion, five hundred twenty-five million, nine hundred seventeen thousand, nine hundred eighty-eight".