18044120 has 16 divisors (see below), whose sum is σ = 40599360. Its totient is φ = 7217632.

The previous prime is 18044113. The next prime is 18044161. The reversal of 18044120 is 2144081.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a junction number, because it is equal to n+sod(n) for n = 18044092 and 18044101.

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, 225512 + ... + 225591.

It is an arithmetic number, because the mean of its divisors is an integer number (2537460).

Almost surely, 2^18044120 is an apocalyptic number.

18044120 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

18044120 is an abundant number, since it is smaller than the sum of its proper divisors (22555240).

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

18044120 is a wasteful number, since it uses less digits than its factorization.

18044120 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 451114 (or 451110 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 20.

The square root of 18044120 is about 4247.8370966881. The cubic root of 18044120 is about 262.2880889896.

The spelling of 18044120 in words is "eighteen million, forty-four thousand, one hundred twenty".