18310579972 has 6 divisors (see below), whose sum is σ = 32043514958. Its totient is φ = 9155289984.

The previous prime is 18310579957. The next prime is 18310580009. The reversal of 18310579972 is 27997501381.

It can be written as a sum of positive squares in only one way, i.e., 17693256256 + 617323716 = 133016^2 + 24846^2 .

It is a super-2 number, since 2×18310579972² (a number of 21 digits) contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2288822493 + ... + 2288822500.

Almost surely, 2^18310579972 is an apocalyptic number.

It is an amenable number.

18310579972 is a deficient number, since it is larger than the sum of its proper divisors (13732934986).

18310579972 is a wasteful number, since it uses less digits than its factorization.

18310579972 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4577644997 (or 4577644995 counting only the distinct ones).

The product of its (nonzero) digits is 952560, while the sum is 52.

The spelling of 18310579972 in words is "eighteen billion, three hundred ten million, five hundred seventy-nine thousand, nine hundred seventy-two".