18112144 has 10 divisors (see below), whose sum is σ = 35092310. Its totient is φ = 9056064.

The previous prime is 18112141. The next prime is 18112147. The reversal of 18112144 is 44121181.

It is an interprime number because it is at equal distance from previous prime (18112141) and next prime (18112147).

It can be written as a sum of positive squares in only one way, i.e., 11289600 + 6822544 = 3360^2 + 2612^2 .

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 (18112141) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 565989 + ... + 566020.

It is an arithmetic number, because the mean of its divisors is an integer number (3509231).

Almost surely, 2^18112144 is an apocalyptic number.

It is an amenable number.

18112144 is a deficient number, since it is larger than the sum of its proper divisors (16980166).

18112144 is a wasteful number, since it uses less digits than its factorization.

18112144 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1132017 (or 1132011 counting only the distinct ones).

The product of its digits is 256, while the sum is 22.

The square root of 18112144 is about 4255.8364630235. The cubic root of 18112144 is about 262.6172730723.

The spelling of 18112144 in words is "eighteen million, one hundred twelve thousand, one hundred forty-four".