18982 has 4 divisors (see below), whose sum is σ = 28476. Its totient is φ = 9490.

The previous prime is 18979. The next prime is 19001. The reversal of 18982 is 28981.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 28981 = 73 ⋅397.

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 18982.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4744 + ... + 4747.

It is an arithmetic number, because the mean of its divisors is an integer number (7119).

2¹⁸⁹⁸² is an apocalyptic number.

18982 is a deficient number, since it is larger than the sum of its proper divisors (9494).

18982 is an equidigital number, since it uses as much as digits as its factorization.

18982 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9493.

The product of its digits is 1152, while the sum is 28.

The square root of 18982 is about 137.7751791870. The cubic root of 18982 is about 26.6755872933.

Subtracting 18982 from its reverse (28981), we obtain a palindrome (9999).

It can be divided in two parts, 18 and 982, that added together give a cube (1000 = 10³).

The spelling of 18982 in words is "eighteen thousand, nine hundred eighty-two".