18233303840 has 24 divisors (see below), whose sum is σ = 43076180700. Its totient is φ = 7293321472.

The previous prime is 18233303831. The next prime is 18233303857. The reversal of 18233303840 is 4830333281.

It can be written as a sum of positive squares in 2 ways, for example, as 14912317456 + 3320986384 = 122116^2 + 57628^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 18233303840.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 56978915 + ... + 56979234.

Almost surely, 2^18233303840 is an apocalyptic number.

18233303840 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

18233303840 is an abundant number, since it is smaller than the sum of its proper divisors (24842876860).

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

18233303840 is a wasteful number, since it uses less digits than its factorization.

18233303840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 113958164 (or 113958156 counting only the distinct ones).

The product of its (nonzero) digits is 41472, while the sum is 35.

The spelling of 18233303840 in words is "eighteen billion, two hundred thirty-three million, three hundred three thousand, eight hundred forty".