18313274640 has 160 divisors (see below), whose sum is σ = 59819028480. Its totient is φ = 4621874688.

The previous prime is 18313274611. The next prime is 18313274657. The reversal of 18313274640 is 4647231381.

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 31 ways as a sum of consecutive naturals, for example, 8311779 + ... + 8313981.

It is an arithmetic number, because the mean of its divisors is an integer number (373868928).

Almost surely, 2^18313274640 is an apocalyptic number.

18313274640 is a gapful number since it is divisible by the number (10) 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 18313274640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (29909514240).

18313274640 is an abundant number, since it is smaller than the sum of its proper divisors (41505753840).

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

18313274640 is a wasteful number, since it uses less digits than its factorization.

18313274640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4061 (or 4055 counting only the distinct ones).

The product of its (nonzero) digits is 96768, while the sum is 39.

The spelling of 18313274640 in words is "eighteen billion, three hundred thirteen million, two hundred seventy-four thousand, six hundred forty".