18903656928 has 192 divisors, whose sum is σ = 56401712640. Its totient is φ = 5495703552.

The previous prime is 18903656903. The next prime is 18903656951. The reversal of 18903656928 is 82965630981.

It is a Harshad number since it is a multiple of its sum of digits (57).

It is a congruent number.

It is an unprimeable number.

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 31 ways as a sum of consecutive naturals, for example, 11546926 + ... + 11548562.

It is an arithmetic number, because the mean of its divisors is an integer number (293758920).

Almost surely, 2^18903656928 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 18903656928, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (28200856320).

18903656928 is an abundant number, since it is smaller than the sum of its proper divisors (37498055712).

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

18903656928 is a wasteful number, since it uses less digits than its factorization.

18903656928 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2169 (or 2161 counting only the distinct ones).

The product of its (nonzero) digits is 5598720, while the sum is 57.

The spelling of 18903656928 in words is "eighteen billion, nine hundred three million, six hundred fifty-six thousand, nine hundred twenty-eight".