18236 has 12 divisors (see below), whose sum is σ = 32928. Its totient is φ = 8832.

The previous prime is 18233. The next prime is 18251. The reversal of 18236 is 63281.

It is a plaindrome in base 11.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18233) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 140 + ... + 236.

It is an arithmetic number, because the mean of its divisors is an integer number (2744).

2¹⁸²³⁶ is an apocalyptic number.

It is an amenable number.

18236 is a deficient number, since it is larger than the sum of its proper divisors (14692).

18236 is a wasteful number, since it uses less digits than its factorization.

18236 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 148 (or 146 counting only the distinct ones).

The product of its digits is 288, while the sum is 20.

The square root of 18236 is about 135.0407345952. The cubic root of 18236 is about 26.3214530968.

The spelling of 18236 in words is "eighteen thousand, two hundred thirty-six".