19744 has 12 divisors (see below), whose sum is σ = 38934. Its totient is φ = 9856.

The previous prime is 19739. The next prime is 19751. The reversal of 19744 is 44791.

It can be written as a sum of positive squares in only one way, i.e., 19600 + 144 = 140^2 + 12^2 .

It is an Ulam number.

It is an unprimeable number.

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 as a sum of consecutive naturals, namely, 277 + ... + 340.

2¹⁹⁷⁴⁴ is an apocalyptic number.

It is an amenable number.

19744 is a deficient number, since it is larger than the sum of its proper divisors (19190).

19744 is an equidigital number, since it uses as much as digits as its factorization.

19744 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 627 (or 619 counting only the distinct ones).

The product of its digits is 1008, while the sum is 25.

The square root of 19744 is about 140.5133445620. The cubic root of 19744 is about 27.0278633255.

It can be divided in two parts, 197 and 44, that multiplied together give a palindrome (8668).

The spelling of 19744 in words is "nineteen thousand, seven hundred forty-four".