18899066397636 has 72 divisors (see below), whose sum is σ = 47833937808384. Its totient is φ = 6291609811200.

The previous prime is 18899066397611. The next prime is 18899066397661. The reversal of 18899066397636 is 63679366099881.

18899066397636 is a `hidden beast` number, since 1 + 8 + 89 + 90 + 6 + 6 + 397 + 63 + 6 = 666.

It is an interprime number because it is at equal distance from previous prime (18899066397611) and next prime (18899066397661).

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 109522521 + ... + 109694943.

Almost surely, 2^{18899066397636} is an apocalyptic number.

It is an amenable number.

18899066397636 is an abundant number, since it is smaller than the sum of its proper divisors (28934871410748).

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

18899066397636 is a wasteful number, since it uses less digits than its factorization.

18899066397636 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 176321 (or 176316 counting only the distinct ones).

The product of its (nonzero) digits is 3809369088, while the sum is 81.

The spelling of 18899066397636 in words is "eighteen trillion, eight hundred ninety-nine billion, sixty-six million, three hundred ninety-seven thousand, six hundred thirty-six".