18005157594432 has 336 divisors, whose sum is σ = 52985217871872. Its totient is φ = 5843040998400.

The previous prime is 18005157594421. The next prime is 18005157594433. The reversal of 18005157594432 is 23449575150081.

18005157594432 is a `hidden beast` number, since 1 + 8 + 0 + 0 + 5 + 1 + 5 + 7 + 594 + 43 + 2 = 666.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18005157594433) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 6315381807 + ... + 6315384657.

Almost surely, 2^{18005157594432} is an apocalyptic number.

18005157594432 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 18005157594432, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (26492608935936).

18005157594432 is an abundant number, since it is smaller than the sum of its proper divisors (34980060277440).

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

18005157594432 is a wasteful number, since it uses less digits than its factorization.

18005157594432 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4066 (or 4053 counting only the distinct ones).

The product of its (nonzero) digits is 6048000, while the sum is 54.

The spelling of 18005157594432 in words is "eighteen trillion, five billion, one hundred fifty-seven million, five hundred ninety-four thousand, four hundred thirty-two".