18244 has 6 divisors (see below), whose sum is σ = 31934. Its totient is φ = 9120.

The previous prime is 18233. The next prime is 18251. The reversal of 18244 is 44281.

It can be written as a sum of positive squares in only one way, i.e., 14400 + 3844 = 120^2 + 62^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2277 + ... + 2284.

2¹⁸²⁴⁴ is an apocalyptic number.

It is an amenable number.

18244 is a deficient number, since it is larger than the sum of its proper divisors (13690).

18244 is a wasteful number, since it uses less digits than its factorization.

18244 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4565 (or 4563 counting only the distinct ones).

The product of its digits is 256, while the sum is 19.

The square root of 18244 is about 135.0703520392. The cubic root of 18244 is about 26.3253015438.

Subtracting from 18244 its sum of digits (19), we obtain a square (18225 = 135²).

It can be divided in two parts, 182 and 44, that multiplied together give a palindrome (8008).

The spelling of 18244 in words is "eighteen thousand, two hundred forty-four".