18274 has 4 divisors (see below), whose sum is σ = 27414. Its totient is φ = 9136.

The previous prime is 18269. The next prime is 18287. The reversal of 18274 is 47281.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 47281 = 13 ⋅3637.

It can be written as a sum of positive squares in only one way, i.e., 18225 + 49 = 135^2 + 7^2 .

It is a Smith number, since the sum of its digits (22) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is an unprimeable number.

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 as a sum of consecutive naturals, namely, 4567 + ... + 4570.

2¹⁸²⁷⁴ is an apocalyptic number.

18274 is a deficient number, since it is larger than the sum of its proper divisors (9140).

18274 is an equidigital number, since it uses as much as digits as its factorization.

18274 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9139.

The product of its digits is 448, while the sum is 22.

The square root of 18274 is about 135.1813596618. The cubic root of 18274 is about 26.3397232086.

It can be divided in two parts, 182 and 74, that added together give a 8-th power (256 = 2⁸).

The spelling of 18274 in words is "eighteen thousand, two hundred seventy-four".