18099984136 has 256 divisors, whose sum is σ = 42964992000. Its totient is φ = 7057290240.

The previous prime is 18099984127. The next prime is 18099984169. The reversal of 18099984136 is 63148999081.

It is a Harshad number since it is a multiple of its sum of digits (58).

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 40857531 + ... + 40857973.

It is an arithmetic number, because the mean of its divisors is an integer number (167832000).

Almost surely, 2^18099984136 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 18099984136, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (21482496000).

18099984136 is an abundant number, since it is smaller than the sum of its proper divisors (24865007864).

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

18099984136 is a wasteful number, since it uses less digits than its factorization.

18099984136 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 564 (or 560 counting only the distinct ones).

The product of its (nonzero) digits is 3359232, while the sum is 58.

The spelling of 18099984136 in words is "eighteen billion, ninety-nine million, nine hundred eighty-four thousand, one hundred thirty-six".