18380518680 has 128 divisors (see below), whose sum is σ = 58084646400. Its totient is φ = 4640228352.

The previous prime is 18380518679. The next prime is 18380518727. The reversal of 18380518680 is 8681508381.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 6330109 + ... + 6333011.

It is an arithmetic number, because the mean of its divisors is an integer number (453786300).

Almost surely, 2^18380518680 is an apocalyptic number.

18380518680 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 18380518680, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (29042323200).

18380518680 is an abundant number, since it is smaller than the sum of its proper divisors (39704127720).

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

18380518680 is a wasteful number, since it uses less digits than its factorization.

18380518680 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5713 (or 5709 counting only the distinct ones).

The product of its (nonzero) digits is 368640, while the sum is 48.

The spelling of 18380518680 in words is "eighteen billion, three hundred eighty million, five hundred eighteen thousand, six hundred eighty".