2021020 has 12 divisors (see below), whose sum is σ = 4244184. Its totient is φ = 808400.

The previous prime is 2021017. The next prime is 2021029. The reversal of 2021020 is 201202.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 2020994 and 2021012.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2021029) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 50506 + ... + 50545.

It is an arithmetic number, because the mean of its divisors is an integer number (353682).

2^2021020 is an apocalyptic number.

2021020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2021020 is an abundant number, since it is smaller than the sum of its proper divisors (2223164).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

2021020 is a wasteful number, since it uses less digits than its factorization.

2021020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 101060 (or 101058 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 7.

The square root of 2021020 is about 1421.6258298160. The cubic root of 2021020 is about 126.4319599523.

Adding to 2021020 its reverse (201202), we get a palindrome (2222222).

The spelling of 2021020 in words is "two million, twenty-one thousand, twenty".