19982 has 8 divisors (see below), whose sum is σ = 30576. Its totient is φ = 9792.

The previous prime is 19979. The next prime is 19991. The reversal of 19982 is 28991.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is an unprimeable number.

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 in 3 ways as a sum of consecutive naturals, for example, 143 + ... + 245.

It is an arithmetic number, because the mean of its divisors is an integer number (3822).

2¹⁹⁹⁸² is an apocalyptic number.

19982 is a deficient number, since it is larger than the sum of its proper divisors (10594).

19982 is a wasteful number, since it uses less digits than its factorization.

19982 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 202.

The product of its digits is 1296, while the sum is 29.

The square root of 19982 is about 141.3577023016. The cubic root of 19982 is about 27.1360304689.

Subtracting 19982 from its reverse (28991), we obtain a palindrome (9009).

It can be divided in two parts, 19 and 982, that added together give a palindrome (1001).

The spelling of 19982 in words is "nineteen thousand, nine hundred eighty-two".