18052397568 has 120 divisors (see below), whose sum is σ = 52434392868. Its totient is φ = 5978898432.

The previous prime is 18052397551. The next prime is 18052397579. The reversal of 18052397568 is 86579325081.

It can be written as a sum of positive squares in 2 ways, for example, as 18050459904 + 1937664 = 134352^2 + 1392^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 710980 + ... + 735932.

Almost surely, 2^18052397568 is an apocalyptic number.

18052397568 is a gapful number since it is divisible by the number (18) 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 18052397568, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (26217196434).

18052397568 is an abundant number, since it is smaller than the sum of its proper divisors (34381995300).

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

18052397568 is a wasteful number, since it uses less digits than its factorization.

18052397568 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25134 (or 25115 counting only the distinct ones).

The product of its (nonzero) digits is 3628800, while the sum is 54.

The spelling of 18052397568 in words is "eighteen billion, fifty-two million, three hundred ninety-seven thousand, five hundred sixty-eight".