19473 has 4 divisors (see below), whose sum is σ = 25968. Its totient is φ = 12980.

The previous prime is 19471. The next prime is 19477. The reversal of 19473 is 37491.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 37491 = 3 ⋅12497.

It is a cyclic number.

It is not a de Polignac number, because 19473 - 2¹ = 19471 is a prime.

It is a D-number.

It is not an unprimeable number, because it can be changed into a prime (19471) by changing a digit.

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 in 3 ways as a sum of consecutive naturals, for example, 3243 + ... + 3248.

It is an arithmetic number, because the mean of its divisors is an integer number (6492).

2¹⁹⁴⁷³ is an apocalyptic number.

It is an amenable number.

19473 is a deficient number, since it is larger than the sum of its proper divisors (6495).

19473 is an equidigital number, since it uses as much as digits as its factorization.

19473 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6494.

The product of its digits is 756, while the sum is 24.

The square root of 19473 is about 139.5456914419. The cubic root of 19473 is about 26.9036345241.

The spelling of 19473 in words is "nineteen thousand, four hundred seventy-three".