18787028928 has 112 divisors (see below), whose sum is σ = 50120239104. Its totient is φ = 6210549760.

The previous prime is 18787028903. The next prime is 18787028929. The reversal of 18787028928 is 82982078781.

It is a Smith number, since the sum of its digits (60) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18787028929) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 17125276 + ... + 17126372.

Almost surely, 2^18787028928 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 18787028928, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (25060119552).

18787028928 is an abundant number, since it is smaller than the sum of its proper divisors (31333210176).

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

18787028928 is a wasteful number, since it uses less digits than its factorization.

18787028928 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1770 (or 1760 counting only the distinct ones).

The product of its (nonzero) digits is 7225344, while the sum is 60.

The spelling of 18787028928 in words is "eighteen billion, seven hundred eighty-seven million, twenty-eight thousand, nine hundred twenty-eight".