2102020 has 24 divisors (see below), whose sum is σ = 4443264.
Its totient is φ = 835296.
The previous prime is 2101961. The next prime is 2102021. The reversal of 2102020 is 202012.
Adding to 2102020 its reverse (202012), we get a palindrome (2304032).
It is a happy number.
It is a junction number, because it is equal to n+sod(n) for n = 2101994 and 2102012.
It is not an unprimeable number, because it can be changed into a prime (2102021) by changing a digit.
It is a pernicious number, because its binary representation contains a prime number (5) of ones.
It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4309 + ... + 4771.
It is an arithmetic number, because the mean of its divisors is an integer number (185136).
22102020 is an apocalyptic number.
2102020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.
It is an amenable number.
2102020 is an abundant number, since it is smaller than the sum of its proper divisors (2341244).
It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.
2102020 is a wasteful number, since it uses less digits than its factorization.
2102020 is an odious number, because the sum of its binary digits is odd.
The sum of its prime factors is 699 (or 697 counting only the distinct ones).
The product of its (nonzero) digits is 8, while the sum is 7.
The square root of 2102020 is about 1449.8344733107.
The cubic root of 2102020 is about 128.0989631805.
The spelling of 2102020 in words is "two million, one hundred two thousand, twenty".