It is a congruent number.
Almost surely, 216819920 is an apocalyptic number.
16819920 is a gapful number since it is divisible by the number (10) 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 16819920, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (31248000).
It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.
16819920 is a wasteful number, since it uses less digits than its factorization.
16819920 is an evil number, because the sum of its binary digits is even.
The square root of 16819920 is about 4101.2095776734. The cubic root of 16819920 is about 256.2170197492.
The spelling of 16819920 in words is "sixteen million, eight hundred nineteen thousand, nine hundred twenty".