18361899635922 has 40 divisors (see below), whose sum is σ = 41290677535932. Its totient is φ = 6098851584000.

The previous prime is 18361899635897. The next prime is 18361899635939. The reversal of 18361899635922 is 22953699816381.

It is a happy number.

18361899635922 is a `hidden beast` number, since 1 + 8 + 3 + 6 + 189 + 96 + 359 + 2 + 2 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 18031666669641 + 330232966281 = 4246371^2 + 574659^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 201636079 + ... + 201727122.

Almost surely, 2^{18361899635922} is an apocalyptic number.

18361899635922 is an abundant number, since it is smaller than the sum of its proper divisors (22928777900010).

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

18361899635922 is a wasteful number, since it uses less digits than its factorization.

18361899635922 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 403363496 (or 403363487 counting only the distinct ones).

The product of its digits is 302330880, while the sum is 72.

The spelling of 18361899635922 in words is "eighteen trillion, three hundred sixty-one billion, eight hundred ninety-nine million, six hundred thirty-five thousand, nine hundred twenty-two".