It is a super Niven number, because it is divisible the sum of any subset of its (nonzero) digits.
It is a plaindrome in base 13.
It is a congruent number.
It is an unprimeable number.
2100020 is an apocalyptic number.
100020 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 pseudoperfect number, because it is the sum of a subset of its proper divisors.
100020 is a wasteful number, since it uses less digits than its factorization.
100020 is an evil number, because the sum of its binary digits is even.
The square root of 100020 is about 316.2593872125. The cubic root of 100020 is about 46.4189825224.
Adding to 100020 its reverse (20001), we get a palindrome (120021).
The spelling of 100020 in words is "one hundred thousand, twenty", and thus it is an iban number.