18244144 has 20 divisors (see below), whose sum is σ = 35470696. Its totient is φ = 9090432.

The previous prime is 18244141. The next prime is 18244183. The reversal of 18244144 is 44144281.

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

It is not an unprimeable number, because it can be changed into a prime (18244141) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3187 + ... + 6829.

Almost surely, 2^18244144 is an apocalyptic number.

It is an amenable number.

18244144 is a deficient number, since it is larger than the sum of its proper divisors (17226552).

18244144 is a wasteful number, since it uses less digits than its factorization.

18244144 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3964 (or 3958 counting only the distinct ones).

The product of its digits is 4096, while the sum is 28.

The square root of 18244144 is about 4271.3164247103. The cubic root of 18244144 is about 263.2537080556.

The spelling of 18244144 in words is "eighteen million, two hundred forty-four thousand, one hundred forty-four".