22691564520 has 32 divisors (see below), whose sum is σ = 68074693920. Its totient is φ = 6051083840.

The previous prime is 22691564459. The next prime is 22691564557. The reversal of 22691564520 is 2546519622.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 94548066 + ... + 94548305.

It is an arithmetic number, because the mean of its divisors is an integer number (2127334185).

Almost surely, 2^22691564520 is an apocalyptic number.

22691564520 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

22691564520 is an abundant number, since it is smaller than the sum of its proper divisors (45383129400).

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

22691564520 is a wasteful number, since it uses less digits than its factorization.

22691564520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 189096385 (or 189096381 counting only the distinct ones).

The product of its (nonzero) digits is 259200, while the sum is 42.

The spelling of 22691564520 in words is "twenty-two billion, six hundred ninety-one million, five hundred sixty-four thousand, five hundred twenty".