18273 has 4 divisors (see below), whose sum is σ = 24368. Its totient is φ = 12180.

The previous prime is 18269. The next prime is 18287. The reversal of 18273 is 37281.

18273 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 18273 - 2² = 18269 is a prime.

It is a D-number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (18223) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3043 + ... + 3048.

It is an arithmetic number, because the mean of its divisors is an integer number (6092).

2¹⁸²⁷³ is an apocalyptic number.

It is an amenable number.

18273 is a deficient number, since it is larger than the sum of its proper divisors (6095).

18273 is an equidigital number, since it uses as much as digits as its factorization.

18273 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6094.

The product of its digits is 336, while the sum is 21.

The square root of 18273 is about 135.1776608763. The cubic root of 18273 is about 26.3392427408.

It can be divided in two parts, 1827 and 3, that added together give a triangular number (1830 = T₆₀).

The spelling of 18273 in words is "eighteen thousand, two hundred seventy-three".