18057844 has 12 divisors (see below), whose sum is σ = 36115744. Its totient is φ = 7739064.

The previous prime is 18057839. The next prime is 18057863. The reversal of 18057844 is 44875081.

18057844 is an admirable number.

It is a hoax number, since the sum of its digits (37) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 322434 + ... + 322489.

Almost surely, 2^18057844 is an apocalyptic number.

18057844 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

18057844 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

18057844 is a wasteful number, since it uses less digits than its factorization.

18057844 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 644934 (or 644932 counting only the distinct ones).

The product of its (nonzero) digits is 35840, while the sum is 37.

The square root of 18057844 is about 4249.4521999900. The cubic root of 18057844 is about 262.3545691784.

The spelling of 18057844 in words is "eighteen million, fifty-seven thousand, eight hundred forty-four".