It is an Ulam number.
It is a nialpdrome in base 3.
It is a zygodrome in base 3.
It is a congruent number.
It is an unprimeable number.
19642 is an untouchable number, because it is not equal to the sum of proper divisors of any number.
19642 is a Friedman number, since it can be written as (6/2)^9-41, using all its digits and the basic arithmetic operations.
219642 is an apocalyptic number.
19642 is a wasteful number, since it uses less digits than its factorization.
19642 is an evil number, because the sum of its binary digits is even.
The sum of its prime factors is 93.
The square root of 19642 is about 140.1499197288. The cubic root of 19642 is about 26.9812398258.
The spelling of 19642 in words is "nineteen thousand, six hundred forty-two".