18279 has 8 divisors (see below), whose sum is σ = 27120. Its totient is φ = 12168.

The previous prime is 18269. The next prime is 18287. The reversal of 18279 is 97281.

It is not a de Polignac number, because 18279 - 2¹¹ = 16231 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27), and also a Moran number because the ratio is a prime number: 677 = 18279 / (1 + 8 + 2 + 7 + 9).

18279 is a lucky number.

It is a nialpdrome in base 13.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18229) by changing a digit.

It is a nontrivial repunit in base 26.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 312 + ... + 365.

It is an arithmetic number, because the mean of its divisors is an integer number (3390).

2¹⁸²⁷⁹ is an apocalyptic number.

18279 is a deficient number, since it is larger than the sum of its proper divisors (8841).

18279 is an equidigital number, since it uses as much as digits as its factorization.

18279 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 686 (or 680 counting only the distinct ones).

The product of its digits is 1008, while the sum is 27.

The square root of 18279 is about 135.1998520709. The cubic root of 18279 is about 26.3421252845.

Subtracting from 18279 its product of digits (1008), we obtain a palindrome (17271).

The spelling of 18279 in words is "eighteen thousand, two hundred seventy-nine".