18678056768 has 112 divisors (see below), whose sum is σ = 43323052800. Its totient is φ = 7986488832.

The previous prime is 18678056731. The next prime is 18678056773. The reversal of 18678056768 is 86765087681.

It is a tau number, because it is divible by the number of its divisors (112).

It is a self number, because there is not a number n which added to its sum of digits gives 18678056768.

It is a congruent number.

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 15 ways as a sum of consecutive naturals, for example, 14334005 + ... + 14335307.

Almost surely, 2^18678056768 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 18678056768, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (21661526400).

18678056768 is an abundant number, since it is smaller than the sum of its proper divisors (24644996032).

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

18678056768 is an equidigital number, since it uses as much as digits as its factorization.

18678056768 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1989 (or 1965 counting only the distinct ones).

The product of its (nonzero) digits is 27095040, while the sum is 62.

The spelling of 18678056768 in words is "eighteen billion, six hundred seventy-eight million, fifty-six thousand, seven hundred sixty-eight".