18328320000 has 720 divisors, whose sum is σ = 69515966520. Its totient is φ = 4644864000.

The previous prime is 18328319993. The next prime is 18328320001. The reversal of 18328320000 is 2382381.

18328320000 is a `hidden beast` number, since 18 + 328 + 320 + 0 + 0 + 0 = 666.

It is a tau number, because it is divible by the number of its divisors (720).

It is a hoax number, since the sum of its digits (27) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18328320001) 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 59 ways as a sum of consecutive naturals, for example, 426239979 + ... + 426240021.

Almost surely, 2^18328320000 is an apocalyptic number.

18328320000 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 18328320000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (34757983260).

18328320000 is an abundant number, since it is smaller than the sum of its proper divisors (51187646520).

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

18328320000 is an equidigital number, since it uses as much as digits as its factorization.

18328320000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 128 (or 90 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 27.

The spelling of 18328320000 in words is "eighteen billion, three hundred twenty-eight million, three hundred twenty thousand".