19673 has 4 divisors (see below), whose sum is σ = 19968. Its totient is φ = 19380.

The previous prime is 19661. The next prime is 19681. The reversal of 19673 is 37691.

It is a happy number.

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 a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 19673 - 2⁶ = 19609 is a prime.

It is a Duffinian number.

It is a plaindrome in base 7.

It is not an unprimeable number, because it can be changed into a prime (19603) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8 + ... + 198.

It is an arithmetic number, because the mean of its divisors is an integer number (4992).

2¹⁹⁶⁷³ is an apocalyptic number.

It is an amenable number.

19673 is a deficient number, since it is larger than the sum of its proper divisors (295).

19673 is a wasteful number, since it uses less digits than its factorization.

19673 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 294.

The product of its digits is 1134, while the sum is 26.

The square root of 19673 is about 140.2604719798. The cubic root of 19673 is about 26.9954267517.

The spelling of 19673 in words is "nineteen thousand, six hundred seventy-three".