18328796640 has 480 divisors, whose sum is σ = 80651096064. Its totient is φ = 3808373760.

The previous prime is 18328796627. The next prime is 18328796677. The reversal of 18328796640 is 4669782381.

It is a tau number, because it is divible by the number of its divisors (480).

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 988737 + ... + 1007103.

Almost surely, 2^18328796640 is an apocalyptic number.

18328796640 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 18328796640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (40325548032).

18328796640 is an abundant number, since it is smaller than the sum of its proper divisors (62322299424).

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

18328796640 is a wasteful number, since it uses less digits than its factorization.

18328796640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18412 (or 18395 counting only the distinct ones).

The product of its (nonzero) digits is 3483648, while the sum is 54.

The spelling of 18328796640 in words is "eighteen billion, three hundred twenty-eight million, seven hundred ninety-six thousand, six hundred forty".