18826 has 4 divisors (see below), whose sum is σ = 28242. Its totient is φ = 9412.

The previous prime is 18803. The next prime is 18839. The reversal of 18826 is 62881.

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., 9801 + 9025 = 99^2 + 95^2 .

It is a nialpdrome in base 13.

It is a self number, because there is not a number n which added to its sum of digits gives 18826.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4705 + ... + 4708.

2¹⁸⁸²⁶ is an apocalyptic number.

18826 is a deficient number, since it is larger than the sum of its proper divisors (9416).

18826 is an equidigital number, since it uses as much as digits as its factorization.

18826 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9415.

The product of its digits is 768, while the sum is 25.

The square root of 18826 is about 137.2078714943. The cubic root of 18826 is about 26.6023100864.

The spelling of 18826 in words is "eighteen thousand, eight hundred twenty-six".