It is a semiprime because it is the product of two primes.
It is a plaindrome in base 16.
It is a congruent number.
It is an unprimeable number.
18878 is an untouchable number, because it is not equal to the sum of proper divisors of any number.
218878 is an apocalyptic number.
18878 is an equidigital number, since it uses as much as digits as its factorization.
18878 is an odious number, because the sum of its binary digits is odd.
The sum of its prime factors is 9441.
The square root of 18878 is about 137.3972343244. The cubic root of 18878 is about 26.6267806490.
The spelling of 18878 in words is "eighteen thousand, eight hundred seventy-eight".