2020100 has 18 divisors (see below), whose sum is σ = 4383834.
Its totient is φ = 808000.
The previous prime is 2020091. The next prime is 2020147. The reversal of 2020100 is 10202.
It can be written as a sum of positive squares in 3 ways, for example, as 37636 + 1982464 = 194^2 + 1408^2
It is a Harshad number since it is a multiple of its sum of digits (5).
It is a congruent number.
It is an unprimeable number.
It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 10001 + ... + 10200.
22020100 is an apocalyptic number.
2020100 is a gapful number since it is divisible by the number (20) formed by its first and last digit.
It is an amenable number.
2020100 is an abundant number, since it is smaller than the sum of its proper divisors (2363734).
It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.
2020100 is a wasteful number, since it uses less digits than its factorization.
2020100 is an evil number, because the sum of its binary digits is even.
The sum of its prime factors is 20215 (or 20208 counting only the distinct ones).
The product of its (nonzero) digits is 4, while the sum is 5.
The square root of 2020100 is about 1421.3022197970.
The cubic root of 2020100 is about 126.4127724368.
Adding to 2020100 its reverse (10202), we get a palindrome (2030302).
The spelling of 2020100 in words is "two million, twenty thousand, one hundred".