19874 has 8 divisors (see below), whose sum is σ = 31440. Its totient is φ = 9396.

The previous prime is 19867. The next prime is 19889. The reversal of 19874 is 47891.

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

It is a Curzon number.

It is a plaindrome in base 5.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 19874.

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, 224 + ... + 299.

It is an arithmetic number, because the mean of its divisors is an integer number (3930).

2¹⁹⁸⁷⁴ is an apocalyptic number.

19874 is a deficient number, since it is larger than the sum of its proper divisors (11566).

19874 is a wasteful number, since it uses less digits than its factorization.

19874 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 544.

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

The square root of 19874 is about 140.9751751196. The cubic root of 19874 is about 27.0870532694.

It can be divided in two parts, 1987 and 4, that added together give a palindrome (1991).

The spelling of 19874 in words is "nineteen thousand, eight hundred seventy-four".