18040844 has 12 divisors (see below), whose sum is σ = 31605000. Its totient is φ = 9010848.

The previous prime is 18040831. The next prime is 18040879. The reversal of 18040844 is 44804081.

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, 3407 + ... + 6905.

It is an arithmetic number, because the mean of its divisors is an integer number (2633750).

Almost surely, 2^18040844 is an apocalyptic number.

It is an amenable number.

18040844 is a deficient number, since it is larger than the sum of its proper divisors (13564156).

18040844 is a wasteful number, since it uses less digits than its factorization.

18040844 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4792 (or 4790 counting only the distinct ones).

The product of its (nonzero) digits is 4096, while the sum is 29.

The square root of 18040844 is about 4247.4514711766. The cubic root of 18040844 is about 262.2722147919.

The spelling of 18040844 in words is "eighteen million, forty thousand, eight hundred forty-four".