18215995160 has 32 divisors (see below), whose sum is σ = 44711989200. Its totient is φ = 6623998080.

The previous prime is 18215995097. The next prime is 18215995199. The reversal of 18215995160 is 6159951281.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 20699555 + ... + 20700434.

Almost surely, 2^18215995160 is an apocalyptic number.

18215995160 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

18215995160 is an abundant number, since it is smaller than the sum of its proper divisors (26495994040).

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

18215995160 is a wasteful number, since it uses less digits than its factorization.

18215995160 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 41400011 (or 41400007 counting only the distinct ones).

The product of its (nonzero) digits is 194400, while the sum is 47.

The spelling of 18215995160 in words is "eighteen billion, two hundred fifteen million, nine hundred ninety-five thousand, one hundred sixty".