18349093880 has 96 divisors (see below), whose sum is σ = 44775342000. Its totient is φ = 6764479488.

The previous prime is 18349093853. The next prime is 18349093901. The reversal of 18349093880 is 8839094381.

It is a hoax number, since the sum of its digits (53) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

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, 5318396 + ... + 5321844.

Almost surely, 2^18349093880 is an apocalyptic number.

18349093880 is a gapful number since it is divisible by the number (10) 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 18349093880, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (22387671000).

18349093880 is an abundant number, since it is smaller than the sum of its proper divisors (26426248120).

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

18349093880 is a wasteful number, since it uses less digits than its factorization.

18349093880 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4273 (or 4256 counting only the distinct ones).

The product of its (nonzero) digits is 1492992, while the sum is 53.

The spelling of 18349093880 in words is "eighteen billion, three hundred forty-nine million, ninety-three thousand, eight hundred eighty".