18056 has 16 divisors (see below), whose sum is σ = 35340. Its totient is φ = 8640.

The previous prime is 18049. The next prime is 18059. The reversal of 18056 is 65081.

18056 is an esthetic number in base 8, because in such base its adjacent digits differ by 1.

It can be written as a sum of positive squares in 2 ways, for example, as 17956 + 100 = 134^2 + 10^2 .

It is a plaindrome in base 16.

It is a nialpdrome in base 8.

It is not an unprimeable number, because it can be changed into a prime (18059) by changing a digit.

18056 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

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 in 3 ways as a sum of consecutive naturals, for example, 266 + ... + 326.

2¹⁸⁰⁵⁶ is an apocalyptic number.

It is an amenable number.

18056 is a deficient number, since it is larger than the sum of its proper divisors (17284).

18056 is a wasteful number, since it uses less digits than its factorization.

18056 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 104 (or 100 counting only the distinct ones).

The product of its (nonzero) digits is 240, while the sum is 20.

The square root of 18056 is about 134.3726162579. The cubic root of 18056 is about 26.2345638650.

The spelling of 18056 in words is "eighteen thousand, fifty-six".