18093308556 has 72 divisors (see below), whose sum is σ = 44954501200. Its totient is φ = 5662752768.

The previous prime is 18093308537. The next prime is 18093308561. The reversal of 18093308556 is 65580339081.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1495620 + ... + 1507668.

Almost surely, 2^18093308556 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 18093308556, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (22477250600).

18093308556 is an abundant number, since it is smaller than the sum of its proper divisors (26861192644).

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

18093308556 is a wasteful number, since it uses less digits than its factorization.

18093308556 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12523 (or 12504 counting only the distinct ones).

The product of its (nonzero) digits is 777600, while the sum is 48.

The spelling of 18093308556 in words is "eighteen billion, ninety-three million, three hundred eight thousand, five hundred fifty-six".