18031518316536 has 32 divisors (see below), whose sum is σ = 45095723775360. Its totient is φ = 6008249040992.

The previous prime is 18031518316423. The next prime is 18031518316619. The reversal of 18031518316536 is 63561381513081.

It is a congruent number.

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, 141001290 + ... + 141129113.

It is an arithmetic number, because the mean of its divisors is an integer number (1409241367980).

Almost surely, 2^{18031518316536} is an apocalyptic number.

It is an amenable number.

18031518316536 is an abundant number, since it is smaller than the sum of its proper divisors (27064205458824).

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

18031518316536 is a wasteful number, since it uses less digits than its factorization.

18031518316536 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 282133075 (or 282133071 counting only the distinct ones).

The product of its (nonzero) digits is 1555200, while the sum is 51.

The spelling of 18031518316536 in words is "eighteen trillion, thirty-one billion, five hundred eighteen million, three hundred sixteen thousand, five hundred thirty-six".