19424 has 12 divisors (see below), whose sum is σ = 38304. Its totient is φ = 9696.

The previous prime is 19423. The next prime is 19427. The reversal of 19424 is 42491.

It is a junction number, because it is equal to n+sod(n) for n = 19396 and 19405.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19421) by changing a digit.

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 as a sum of consecutive naturals, namely, 272 + ... + 335.

It is an arithmetic number, because the mean of its divisors is an integer number (3192).

2¹⁹⁴²⁴ is an apocalyptic number.

It is an amenable number.

19424 is a deficient number, since it is larger than the sum of its proper divisors (18880).

19424 is an equidigital number, since it uses as much as digits as its factorization.

19424 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 617 (or 609 counting only the distinct ones).

The product of its digits is 288, while the sum is 20.

The square root of 19424 is about 139.3700111215. The cubic root of 19424 is about 26.8810496567.

It can be divided in two parts, 194 and 24, that multiplied together give a triangular number (4656 = T₉₆).

The spelling of 19424 in words is "nineteen thousand, four hundred twenty-four".