It is a tau number, because it is divible by the number of its divisors (36).
It is a congruent number.
It is an unprimeable number.
Almost surely, 220210220 is an apocalyptic number.
20210220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.
It is an amenable number.
It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.
20210220 is a wasteful number, since it uses less digits than its factorization.
20210220 is an evil number, because the sum of its binary digits is even.
The square root of 20210220 is about 4495.5778271541. The cubic root of 20210220 is about 272.3894903020.
Adding to 20210220 its reverse (2201202), we get a palindrome (22411422).
The spelling of 20210220 in words is "twenty million, two hundred ten thousand, two hundred twenty".