18678328320 has 176 divisors, whose sum is σ = 61670181888. Its totient is φ = 4820090880.

The previous prime is 18678328307. The next prime is 18678328343. The reversal of 18678328320 is 2382387681.

It is a Harshad number since it is a multiple of its sum of digits (48).

It is a self number, because there is not a number n which added to its sum of digits gives 18678328320.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 456547 + ... + 495773.

Almost surely, 2^18678328320 is an apocalyptic number.

18678328320 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 18678328320, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (30835090944).

18678328320 is an abundant number, since it is smaller than the sum of its proper divisors (42991853568).

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

18678328320 is a wasteful number, since it uses less digits than its factorization.

18678328320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39286 (or 39268 counting only the distinct ones).

The product of its (nonzero) digits is 774144, while the sum is 48.

The spelling of 18678328320 in words is "eighteen billion, six hundred seventy-eight million, three hundred twenty-eight thousand, three hundred twenty".