18427599168 has 112 divisors (see below), whose sum is σ = 53629072320. Its totient is φ = 5584043520.

The previous prime is 18427599143. The next prime is 18427599193. The reversal of 18427599168 is 86199572481.

It is an interprime number because it is at equal distance from previous prime (18427599143) and next prime (18427599193).

It is a super-2 number, since 2×18427599168² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 219498 + ... + 291606.

Almost surely, 2^18427599168 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 18427599168, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (26814536160).

18427599168 is an abundant number, since it is smaller than the sum of its proper divisors (35201473152).

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

18427599168 is an equidigital number, since it uses as much as digits as its factorization.

18427599168 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 72157 (or 72125 counting only the distinct ones).

The product of its digits is 8709120, while the sum is 60.

The spelling of 18427599168 in words is "eighteen billion, four hundred twenty-seven million, five hundred ninety-nine thousand, one hundred sixty-eight".