It is a nialpdrome in base 13.
It is a self number, because there is not a number n which added to its sum of digits gives 20672.
It is a congruent number.
It is an unprimeable number.
220672 is an apocalyptic number.
It is an amenable number.
It is a practical number, because each smaller number is the sum of distinct divisors of 20672, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (22860).
It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.
20672 is a wasteful number, since it uses less digits than its factorization.
20672 is an evil number, because the sum of its binary digits is even.
The square root of 20672 is about 143.7776060449. Note that the first 3 decimals coincide. The cubic root of 20672 is about 27.4448481434. Note that the first 3 decimals are identical.
The spelling of 20672 in words is "twenty thousand, six hundred seventy-two".