18320622080 has 80 divisors (see below), whose sum is σ = 44095195584. Its totient is φ = 7300116480.

The previous prime is 18320622077. The next prime is 18320622083. The reversal of 18320622080 is 8022602381.

It is an interprime number because it is at equal distance from previous prime (18320622077) and next prime (18320622083).

It is a tau number, because it is divible by the number of its divisors (80).

It is a Harshad number since it is a multiple of its sum of digits (32).

It is not an unprimeable number, because it can be changed into a prime (18320622083) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 659675 + ... + 686885.

Almost surely, 2^18320622080 is an apocalyptic number.

18320622080 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 18320622080, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (22047597792).

18320622080 is an abundant number, since it is smaller than the sum of its proper divisors (25774573504).

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

18320622080 is an equidigital number, since it uses as much as digits as its factorization.

18320622080 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27497 (or 27481 counting only the distinct ones).

The product of its (nonzero) digits is 9216, while the sum is 32.

The spelling of 18320622080 in words is "eighteen billion, three hundred twenty million, six hundred twenty-two thousand, eighty".