18115431939072 has 1056 divisors, whose sum is σ = 59315663534400. Its totient is φ = 5288267612160.

The previous prime is 18115431939071. The next prime is 18115431939089. The reversal of 18115431939072 is 27093913451181.

18115431939072 is a `hidden beast` number, since 1 + 8 + 1 + 1 + 543 + 1 + 9 + 3 + 90 + 7 + 2 = 666.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18115431939071) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 38791074583 + ... + 38791075049.

Almost surely, 2^{18115431939072} is an apocalyptic number.

18115431939072 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 18115431939072, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (29657831767200).

18115431939072 is an abundant number, since it is smaller than the sum of its proper divisors (41200231595328).

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

18115431939072 is a wasteful number, since it uses less digits than its factorization.

18115431939072 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 749 (or 728 counting only the distinct ones).

The product of its (nonzero) digits is 1632960, while the sum is 54.

The spelling of 18115431939072 in words is "eighteen trillion, one hundred fifteen billion, four hundred thirty-one million, nine hundred thirty-nine thousand, seventy-two".