18386 has 8 divisors (see below), whose sum is σ = 28620.
Its totient is φ = 8848.
The previous prime is 18379. The next prime is 18397. The reversal of 18386 is 68381.
It can be written as a sum of positive squares in 2 ways, for example, as 17161 + 1225 = 131^2 + 35^2
It is a sphenic number, since it is the product of 3 distinct primes.
It is a plaindrome in base 15.
It is an unprimeable number.
It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 101 + ... + 216.
218386 is an apocalyptic number.
18386 is a deficient number, since it is larger than the sum of its proper divisors (10234).
18386 is a wasteful number, since it uses less digits than its factorization.
18386 is an evil number, because the sum of its binary digits is even.
The sum of its prime factors is 348.
The product of its digits is 1152, while the sum is 26.
The square root of 18386 is about 135.5949851580.
The cubic root of 18386 is about 26.3934250538.
It can be divided in two parts, 18 and 386, that added together give a palindrome (404).
The spelling of 18386 in words is "eighteen thousand, three hundred eighty-six".