18237 has 4 divisors (see below), whose sum is σ = 24320. Its totient is φ = 12156.

The previous prime is 18233. The next prime is 18251. The reversal of 18237 is 73281.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 18237 - 2² = 18233 is a prime.

It is a D-number.

It is a Duffinian number.

18237 is a lucky number.

It is a plaindrome in base 11.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 18237.

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, 3037 + ... + 3042.

It is an arithmetic number, because the mean of its divisors is an integer number (6080).

2¹⁸²³⁷ is an apocalyptic number.

It is an amenable number.

18237 is a deficient number, since it is larger than the sum of its proper divisors (6083).

18237 is an equidigital number, since it uses as much as digits as its factorization.

18237 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6082.

The product of its digits is 336, while the sum is 21.

The square root of 18237 is about 135.0444371309. The cubic root of 18237 is about 26.3219342142.

It can be divided in two parts, 1823 and 7, that added together give a triangular number (1830 = T₆₀).

The spelling of 18237 in words is "eighteen thousand, two hundred thirty-seven".