18836 has 12 divisors (see below), whose sum is σ = 35028. Its totient is φ = 8832.

The previous prime is 18803. The next prime is 18839. The reversal of 18836 is 63881.

18836 is nontrivially palindromic in base 16.

It can be written as a sum of positive squares in 2 ways, for example, as 8836 + 10000 = 94^2 + 100^2 .

It is a hoax number, since the sum of its digits (26) coincides with the sum of the digits of its distinct prime factors.

It is a plaindrome in base 15.

It is a nialpdrome in base 12.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18839) by changing a digit.

18836 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 71 + ... + 206.

It is an arithmetic number, because the mean of its divisors is an integer number (2919).

2¹⁸⁸³⁶ is an apocalyptic number.

It is an amenable number.

18836 is a deficient number, since it is larger than the sum of its proper divisors (16192).

18836 is a wasteful number, since it uses less digits than its factorization.

18836 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 298 (or 296 counting only the distinct ones).

The product of its digits is 1152, while the sum is 26.

The square root of 18836 is about 137.2443077144. The cubic root of 18836 is about 26.6070194602.

The spelling of 18836 in words is "eighteen thousand, eight hundred thirty-six".