22538577872 has 20 divisors (see below), whose sum is σ = 44159154660. Its totient is φ = 11142667008.

The previous prime is 22538577871. The next prime is 22538577913. The reversal of 22538577872 is 27877583522.

It can be written as a sum of positive squares in 2 ways, for example, as 7978776976 + 14559800896 = 89324^2 + 120664^2 .

It is a hoax number, since the sum of its digits (56) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22538577871) 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, 7912403 + ... + 7915250.

It is an arithmetic number, because the mean of its divisors is an integer number (2207957733).

Almost surely, 2^22538577872 is an apocalyptic number.

It is an amenable number.

22538577872 is a deficient number, since it is larger than the sum of its proper divisors (21620576788).

22538577872 is a wasteful number, since it uses less digits than its factorization.

22538577872 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15827750 (or 15827744 counting only the distinct ones).

The product of its digits is 13171200, while the sum is 56.

The spelling of 22538577872 in words is "twenty-two billion, five hundred thirty-eight million, five hundred seventy-seven thousand, eight hundred seventy-two".