18093189888 has 144 divisors (see below), whose sum is σ = 56321193600. Its totient is φ = 5713597440.

The previous prime is 18093189883. The next prime is 18093189893. The reversal of 18093189888 is 88898139081.

It is an interprime number because it is at equal distance from previous prime (18093189883) and next prime (18093189893).

It is a tau number, because it is divible by the number of its divisors (144).

It is not an unprimeable number, because it can be changed into a prime (18093189883) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 62443 + ... + 200213.

It is an arithmetic number, because the mean of its divisors is an integer number (391119400).

Almost surely, 2^18093189888 is an apocalyptic number.

18093189888 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 18093189888, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (28160596800).

18093189888 is an abundant number, since it is smaller than the sum of its proper divisors (38228003712).

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

18093189888 is a wasteful number, since it uses less digits than its factorization.

18093189888 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 137815 (or 137795 counting only the distinct ones).

The product of its (nonzero) digits is 7962624, while the sum is 63.

The spelling of 18093189888 in words is "eighteen billion, ninety-three million, one hundred eighty-nine thousand, eight hundred eighty-eight".