18291

18291 is a prime number. It is the 2106th prime number. Its decimal representation consists of the digits 1, 8, 2, 9, and 1. In binary, 18291 is represented as 100011110010011. The number can be expressed as the sum of two squares in two distinct ways: 18291 = 52^2 + 107^2 and 18291 = 10^2 + 134^2. It is not a palindrome, nor is it a perfect number or an abundant number. The sum of its digits is 1 + 8 + 2 + 9 + 1 = 21.