18184 has 8 divisors (see below), whose sum is σ = 34110. Its totient is φ = 9088.

The previous prime is 18181. The next prime is 18191. The reversal of 18184 is 48181.

It can be written as a sum of positive squares in only one way, i.e., 12100 + 6084 = 110^2 + 78^2 .

It is a tau number, because it is divible by the number of its divisors (8).

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

It is a plaindrome in base 14.

It is not an unprimeable number, because it can be changed into a prime (18181) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (5) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1129 + ... + 1144.

2¹⁸¹⁸⁴ is an apocalyptic number.

It is an amenable number.

18184 is a deficient number, since it is larger than the sum of its proper divisors (15926).

18184 is a wasteful number, since it uses less digits than its factorization.

18184 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2279 (or 2275 counting only the distinct ones).

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

The square root of 18184 is about 134.8480626483. The cubic root of 18184 is about 26.2964107156.

It can be divided in two parts, 18 and 184, that added together give a palindrome (202).

The spelling of 18184 in words is "eighteen thousand, one hundred eighty-four".