18502 has 12 divisors (see below), whose sum is σ = 31356. Its totient is φ = 8120.

The previous prime is 18493. The next prime is 18503. The reversal of 18502 is 20581.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18503) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (5) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 624 + ... + 652.

It is an arithmetic number, because the mean of its divisors is an integer number (2613).

2¹⁸⁵⁰² is an apocalyptic number.

18502 is a deficient number, since it is larger than the sum of its proper divisors (12854).

18502 is a wasteful number, since it uses less digits than its factorization.

18502 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 71 (or 42 counting only the distinct ones).

The product of its (nonzero) digits is 80, while the sum is 16.

The square root of 18502 is about 136.0220570349. The cubic root of 18502 is about 26.4488154052.

The spelling of 18502 in words is "eighteen thousand, five hundred two".