18086 has 4 divisors (see below), whose sum is σ = 27132. Its totient is φ = 9042.

The previous prime is 18077. The next prime is 18089. The reversal of 18086 is 68081.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 68081 = 13 ⋅5237.

It is a plaindrome in base 15.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18089) by changing a digit.

18086 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 (7) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4520 + ... + 4523.

It is an arithmetic number, because the mean of its divisors is an integer number (6783).

2¹⁸⁰⁸⁶ is an apocalyptic number.

18086 is a deficient number, since it is larger than the sum of its proper divisors (9046).

18086 is an equidigital number, since it uses as much as digits as its factorization.

18086 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9045.

The product of its (nonzero) digits is 384, while the sum is 23.

The square root of 18086 is about 134.4841998154. The cubic root of 18086 is about 26.2490853801.

The spelling of 18086 in words is "eighteen thousand, eighty-six".