18210 has 16 divisors (see below), whose sum is σ = 43776. Its totient is φ = 4848.

The previous prime is 18199. The next prime is 18211. The reversal of 18210 is 1281.

It is a happy number.

It is an Ulam number.

It is not an unprimeable number, because it can be changed into a prime (18211) by changing a digit.

18210 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 7 ways as a sum of consecutive naturals, for example, 274 + ... + 333.

It is an arithmetic number, because the mean of its divisors is an integer number (2736).

2¹⁸²¹⁰ is an apocalyptic number.

18210 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

18210 is an abundant number, since it is smaller than the sum of its proper divisors (25566).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

It is a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (21888).

18210 is a wasteful number, since it uses less digits than its factorization.

18210 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 617.

The product of its (nonzero) digits is 16, while the sum is 12.

The square root of 18210 is about 134.9444330086. The cubic root of 18210 is about 26.3089378654.

Adding to 18210 its reverse (1281), we get a palindrome (19491).

The spelling of 18210 in words is "eighteen thousand, two hundred ten".