18388422660 has 96 divisors (see below), whose sum is σ = 53344448640. Its totient is φ = 4727252992.

The previous prime is 18388422653. The next prime is 18388422707. The reversal of 18388422660 is 6622488381.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1180684 + ... + 1196156.

It is an arithmetic number, because the mean of its divisors is an integer number (555671340).

Almost surely, 2^18388422660 is an apocalyptic number.

18388422660 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 18388422660, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (26672224320).

18388422660 is an abundant number, since it is smaller than the sum of its proper divisors (34956025980).

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

18388422660 is a wasteful number, since it uses less digits than its factorization.

18388422660 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16197 (or 16195 counting only the distinct ones).

The product of its (nonzero) digits is 884736, while the sum is 48.

The spelling of 18388422660 in words is "eighteen billion, three hundred eighty-eight million, four hundred twenty-two thousand, six hundred sixty".