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 a Duffinian number.
It is a plaindrome in base 7.
219673 is an apocalyptic number.
It is an amenable number.
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 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".