18678428320 has 48 divisors (see below), whose sum is σ = 44295672960. Its totient is φ = 7442946304.

The previous prime is 18678428311. The next prime is 18678428339. The reversal of 18678428320 is 2382487681.

It is an unprimeable number.

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, 179860 + ... + 264019.

It is an arithmetic number, because the mean of its divisors is an integer number (922826520).

Almost surely, 2^18678428320 is an apocalyptic number.

18678428320 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

18678428320 is an abundant number, since it is smaller than the sum of its proper divisors (25617244640).

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

18678428320 is a wasteful number, since it uses less digits than its factorization.

18678428320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 444157 (or 444149 counting only the distinct ones).

The product of its (nonzero) digits is 1032192, while the sum is 49.

The spelling of 18678428320 in words is "eighteen billion, six hundred seventy-eight million, four hundred twenty-eight thousand, three hundred twenty".