18042492 has 24 divisors (see below), whose sum is σ = 45337936. Its totient is φ = 5551488.

The previous prime is 18042487. The next prime is 18042503. The reversal of 18042492 is 29424081.

It is a congruent number.

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 7 ways as a sum of consecutive naturals, for example, 57673 + ... + 57984.

Almost surely, 2^18042492 is an apocalyptic number.

18042492 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

18042492 is an abundant number, since it is smaller than the sum of its proper divisors (27295444).

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

18042492 is a wasteful number, since it uses less digits than its factorization.

18042492 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 115677 (or 115675 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 30.

The square root of 18042492 is about 4247.6454654314. The cubic root of 18042492 is about 262.2802005870.

The spelling of 18042492 in words is "eighteen million, forty-two thousand, four hundred ninety-two".