It is a happy number.
It is a congruent number.
It is an unprimeable number.
Almost surely, 221794854224 is an apocalyptic number.
21794854224 is a gapful number since it is divisible by the number (24) formed by its first and last digit.
It is an amenable number.
It is a practical number, because each smaller number is the sum of distinct divisors of 21794854224, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (33189250752).
It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.
21794854224 is a wasteful number, since it uses less digits than its factorization.
21794854224 is an odious number, because the sum of its binary digits is odd.
The spelling of 21794854224 in words is "twenty-one billion, seven hundred ninety-four million, eight hundred fifty-four thousand, two hundred twenty-four".