18310553632 has 72 divisors (see below), whose sum is σ = 42725847276. Its totient is φ = 7699281408.

The previous prime is 18310553623. The next prime is 18310553693. The reversal of 18310553632 is 23635501381.

It can be written as a sum of positive squares in 2 ways, for example, as 16395265936 + 1915287696 = 128044^2 + 43764^2 .

It is a junction number, because it is equal to n+sod(n) for n = 18310553591 and 18310553600.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 27063 + ... + 193270.

Almost surely, 2^18310553632 is an apocalyptic number.

It is an amenable number.

18310553632 is an abundant number, since it is smaller than the sum of its proper divisors (24415293644).

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

18310553632 is a wasteful number, since it uses less digits than its factorization.

18310553632 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 220410 (or 220395 counting only the distinct ones).

The product of its (nonzero) digits is 64800, while the sum is 37.

The spelling of 18310553632 in words is "eighteen billion, three hundred ten million, five hundred fifty-three thousand, six hundred thirty-two".