18704 has 20 divisors (see below), whose sum is σ = 41664. Its totient is φ = 7968.

The previous prime is 18701. The next prime is 18713. The reversal of 18704 is 40781.

It is a happy number.

It is a nialpdrome in base 8.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 18704.

It is not an unprimeable number, because it can be changed into a prime (18701) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 29 + ... + 195.

2¹⁸⁷⁰⁴ is an apocalyptic number.

18704 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 18704, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (20832).

18704 is an abundant number, since it is smaller than the sum of its proper divisors (22960).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

18704 is a wasteful number, since it uses less digits than its factorization.

18704 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 182 (or 176 counting only the distinct ones).

The product of its (nonzero) digits is 224, while the sum is 20.

The square root of 18704 is about 136.7625679782. The cubic root of 18704 is about 26.5447209746.

The spelling of 18704 in words is "eighteen thousand, seven hundred four".