18206 has 4 divisors (see below), whose sum is σ = 27312. Its totient is φ = 9102.

The previous prime is 18199. The next prime is 18211. The reversal of 18206 is 60281.

18206 is nontrivially palindromic in base 3.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 60281 = 13 ⋅4637.

It is a nialpdrome in base 12.

It is a congruent number.

It is an unprimeable number.

18206 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 as a sum of consecutive naturals, namely, 4550 + ... + 4553.

It is an arithmetic number, because the mean of its divisors is an integer number (6828).

2¹⁸²⁰⁶ is an apocalyptic number.

18206 is a deficient number, since it is larger than the sum of its proper divisors (9106).

18206 is an equidigital number, since it uses as much as digits as its factorization.

18206 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9105.

The product of its (nonzero) digits is 96, while the sum is 17.

The square root of 18206 is about 134.9296112794. The cubic root of 18206 is about 26.3070113880.

Adding to 18206 its reverse (60281), we get a palindrome (78487).

The spelling of 18206 in words is "eighteen thousand, two hundred six".