18037842 has 24 divisors (see below), whose sum is σ = 37719024. Its totient is φ = 5750184.

The previous prime is 18037841. The next prime is 18037847. The reversal of 18037842 is 24873081.

It is not an unprimeable number, because it can be changed into a prime (18037841) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 333 + ... + 6015.

It is an arithmetic number, because the mean of its divisors is an integer number (1571626).

Almost surely, 2^18037842 is an apocalyptic number.

18037842 is an abundant number, since it is smaller than the sum of its proper divisors (19681182).

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

18037842 is a wasteful number, since it uses less digits than its factorization.

18037842 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5734 (or 5711 counting only the distinct ones).

The product of its (nonzero) digits is 10752, while the sum is 33.

The square root of 18037842 is about 4247.0980680931. The cubic root of 18037842 is about 262.2576666022.

The spelling of 18037842 in words is "eighteen million, thirty-seven thousand, eight hundred forty-two".