18418144 has 24 divisors (see below), whose sum is σ = 38170440. Its totient is φ = 8724096.

The previous prime is 18418133. The next prime is 18418159. The reversal of 18418144 is 44181481.

It is a nude number because it is divisible by every one of its digits.

It is a congruent number.

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, 14539 + ... + 15754.

It is an arithmetic number, because the mean of its divisors is an integer number (1590435).

Almost surely, 2^18418144 is an apocalyptic number.

It is an amenable number.

18418144 is an abundant number, since it is smaller than the sum of its proper divisors (19752296).

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

18418144 is a wasteful number, since it uses less digits than its factorization.

18418144 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30322 (or 30314 counting only the distinct ones).

The product of its digits is 4096, while the sum is 31.

The square root of 18418144 is about 4291.6365176935. The cubic root of 18418144 is about 264.0879719065.

The spelling of 18418144 in words is "eighteen million, four hundred eighteen thousand, one hundred forty-four".