18040339392 has 56 divisors (see below), whose sum is σ = 49271480832. Its totient is φ = 5819462400.

The previous prime is 18040339381. The next prime is 18040339403. The reversal of 18040339392 is 29393304081.

It is an interprime number because it is at equal distance from previous prime (18040339381) and next prime (18040339403).

It is a Smith number, since the sum of its digits (42) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1509534 + ... + 1521437.

It is an arithmetic number, because the mean of its divisors is an integer number (879847872).

Almost surely, 2^18040339392 is an apocalyptic number.

18040339392 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

18040339392 is an abundant number, since it is smaller than the sum of its proper divisors (31231141440).

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

18040339392 is a wasteful number, since it uses less digits than its factorization.

18040339392 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3031017 (or 3031007 counting only the distinct ones).

The product of its (nonzero) digits is 139968, while the sum is 42.

The spelling of 18040339392 in words is "eighteen billion, forty million, three hundred thirty-nine thousand, three hundred ninety-two".