18874 has 4 divisors (see below), whose sum is σ = 28314.
Its totient is φ = 9436.
The previous prime is 18869. The next prime is 18899. The reversal of 18874 is 47881.
It is a semiprime because it is the product of two primes.
It can be written as a sum of positive squares in only one way, i.e., 15625 + 3249 = 125^2 + 57^2
It is a zygodrome in base 5.
It is an unprimeable number.
It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4717 + ... + 4720.
218874 is an apocalyptic number.
18874 is a deficient number, since it is larger than the sum of its proper divisors (9440).
18874 is an equidigital number, since it uses as much as digits as its factorization.
18874 is an evil number, because the sum of its binary digits is even.
The sum of its prime factors is 9439.
The product of its digits is 1792, while the sum is 28.
The square root of 18874 is about 137.3826772195.
The cubic root of 18874 is about 26.6248998946.
It can be divided in two parts, 1887 and 4, that added together give a triangular number (1891 = T61).
The spelling of 18874 in words is "eighteen thousand, eight hundred seventy-four".