22521758472 has 48 divisors (see below), whose sum is σ = 61076730780. Its totient is φ = 7497369600.

The previous prime is 22521758453. The next prime is 22521758473. The reversal of 22521758472 is 27485712522.

22521758472 is a `hidden beast` number, since 2 + 2 + 5 + 2 + 175 + 8 + 472 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 20342175876 + 2179582596 = 142626^2 + 46686^2 .

It is a super-2 number, since 2×22521758472² (a number of 22 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (22521758473) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 150729 + ... + 260312.

Almost surely, 2^22521758472 is an apocalyptic number.

It is an amenable number.

22521758472 is an abundant number, since it is smaller than the sum of its proper divisors (38554972308).

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

22521758472 is a wasteful number, since it uses less digits than its factorization.

22521758472 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 411814 (or 411807 counting only the distinct ones).

The product of its digits is 627200, while the sum is 45.

The spelling of 22521758472 in words is "twenty-two billion, five hundred twenty-one million, seven hundred fifty-eight thousand, four hundred seventy-two".