It is a tau number, because it is divible by the number of its divisors (8).
It is a nude number because it is divisible by every one of its digits.
It is a plaindrome in base 16.
It is a congruent number.
21848 is a Friedman number, since it can be written as (8+4^8)/(2+1), using all its digits and the basic arithmetic operations.
221848 is an apocalyptic number.
It is an amenable number.
21848 is a wasteful number, since it uses less digits than its factorization.
21848 is an odious number, because the sum of its binary digits is odd.
The square root of 21848 is about 147.8106897352. The cubic root of 21848 is about 27.9557122998.
The spelling of 21848 in words is "twenty-one thousand, eight hundred forty-eight".