16818 has 8 divisors (see below), whose sum is σ = 33648. Its totient is φ = 5604.

The previous prime is 16811. The next prime is 16823. The reversal of 16818 is 81861.

It is a sphenic number, since it is the product of 3 distinct primes.

16818 is an admirable number.

It is a Curzon number.

It is a plaindrome in base 11.

It is not an unprimeable number, because it can be changed into a prime (16811) 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, 1396 + ... + 1407.

It is an arithmetic number, because the mean of its divisors is an integer number (4206).

2¹⁶⁸¹⁸ is an apocalyptic number.

16818 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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 (16824).

16818 is a wasteful number, since it uses less digits than its factorization.

16818 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2808.

The product of its digits is 384, while the sum is 24.

The square root of 16818 is about 129.6842318865. The cubic root of 16818 is about 25.6207270289.

The spelling of 16818 in words is "sixteen thousand, eight hundred eighteen".