18794 has 4 divisors (see below), whose sum is σ = 28194. Its totient is φ = 9396.

The previous prime is 18793. The next prime is 18797. The reversal of 18794 is 49781.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 49781 = 67 ⋅743.

It can be written as a sum of positive squares in only one way, i.e., 18769 + 25 = 137^2 + 5^2 .

It is an Ulam number.

It is a Curzon number.

It is a nialpdrome in base 12.

It is not an unprimeable number, because it can be changed into a prime (18793) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4697 + ... + 4700.

2¹⁸⁷⁹⁴ is an apocalyptic number.

18794 is a deficient number, since it is larger than the sum of its proper divisors (9400).

18794 is an equidigital number, since it uses as much as digits as its factorization.

18794 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9399.

The product of its digits is 2016, while the sum is 29.

The square root of 18794 is about 137.0912105133. The cubic root of 18794 is about 26.5872288741.

It can be divided in two parts, 187 and 94, that multiplied together give a triangular number (17578 = T₁₈₇).

The spelling of 18794 in words is "eighteen thousand, seven hundred ninety-four".