18633987326016 has 84 divisors (see below), whose sum is σ = 55252717497900. Its totient is φ = 5997145340928.

The previous prime is 18633987325979. The next prime is 18633987326029. The reversal of 18633987326016 is 61062378933681.

18633987326016 is a `hidden beast` number, since 18 + 6 + 3 + 3 + 9 + 8 + 7 + 3 + 2 + 601 + 6 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 4203713687616 + 14430273638400 = 2050296^2 + 3798720^2 .

It is a super-2 number, since 2×18633987326016² (a number of 27 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 557753511 + ... + 557786918.

Almost surely, 2^{18633987326016} is an apocalyptic number.

18633987326016 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

18633987326016 is an abundant number, since it is smaller than the sum of its proper divisors (36618730171884).

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

18633987326016 is a wasteful number, since it uses less digits than its factorization.

18633987326016 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1115540476 (or 1115540463 counting only the distinct ones).

The product of its (nonzero) digits is 47029248, while the sum is 63.

The spelling of 18633987326016 in words is "eighteen trillion, six hundred thirty-three billion, nine hundred eighty-seven million, three hundred twenty-six thousand, sixteen".