18774782976 has 176 divisors, whose sum is σ = 53499212928. Its totient is φ = 5839257600.

The previous prime is 18774782969. The next prime is 18774782981. The reversal of 18774782976 is 67928747781.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2893656 + ... + 2900136.

Almost surely, 2^18774782976 is an apocalyptic number.

18774782976 is a gapful number since it is divisible by the number (16) 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 18774782976, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (26749606464).

18774782976 is an abundant number, since it is smaller than the sum of its proper divisors (34724429952).

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

18774782976 is a wasteful number, since it uses less digits than its factorization.

18774782976 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6568 (or 6550 counting only the distinct ones).

The product of its digits is 66382848, while the sum is 66.

The spelling of 18774782976 in words is "eighteen billion, seven hundred seventy-four million, seven hundred eighty-two thousand, nine hundred seventy-six".