It is a weak prime.
It is a cyclic number.
It is a Sophie Germain prime.
It is a Chen prime.
It is an Ulam number.
It is an alternating number because its digits alternate between odd and even.
It is a Curzon number.
It is a plaindrome in base 11 and base 15.
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 18149.
218149 is an apocalyptic number.
It is an amenable number.
18149 is an equidigital number, since it uses as much as digits as its factorization.
18149 is an evil number, because the sum of its binary digits is even.
The square root of 18149 is about 134.7182244539. The cubic root of 18149 is about 26.2795283738.
The spelling of 18149 in words is "eighteen thousand, one hundred forty-nine".