18237990706236 has 144 divisors (see below), whose sum is σ = 55026837885600. Its totient is φ = 5208640125696.

The previous prime is 18237990706213. The next prime is 18237990706253. The reversal of 18237990706236 is 63260709973281.

18237990706236 is a `hidden beast` number, since 1 + 82 + 379 + 90 + 70 + 6 + 2 + 36 = 666.

It is a Harshad number since it is a multiple of its sum of digits (63).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 11742160 + ... + 13204328.

It is an arithmetic number, because the mean of its divisors is an integer number (382130818650).

Almost surely, 2^{18237990706236} 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 18237990706236, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (27513418942800).

18237990706236 is an abundant number, since it is smaller than the sum of its proper divisors (36788847179364).

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

18237990706236 is a wasteful number, since it uses less digits than its factorization.

18237990706236 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1464553 (or 1464538 counting only the distinct ones).

The product of its (nonzero) digits is 41150592, while the sum is 63.

The spelling of 18237990706236 in words is "eighteen trillion, two hundred thirty-seven billion, nine hundred ninety million, seven hundred six thousand, two hundred thirty-six".