2020200021 has 40 divisors (see below), whose sum is σ = 3453591680. Its totient is φ = 1152846432.

The previous prime is 2020199977. The next prime is 2020200031. The reversal of 2020200021 is 1200020202.

It is not a de Polignac number, because 2020200021 - 2⁶ = 2020199957 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (9).

It is a junction number, because it is equal to n+sod(n) for n = 2020199976 and 2020200012.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2020200031) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 519135 + ... + 523011.

It is an arithmetic number, because the mean of its divisors is an integer number (86339792).

Almost surely, 2^2020200021 is an apocalyptic number.

2020200021 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

2020200021 is a deficient number, since it is larger than the sum of its proper divisors (1433391659).

2020200021 is an equidigital number, since it uses as much as digits as its factorization.

2020200021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4815 (or 4806 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 9.

The square root of 2020200021 is about 44946.6352578255. The cubic root of 2020200021 is about 1264.1485875652.

Adding to 2020200021 its reverse (1200020202), we get a palindrome (3220220223).

The spelling of 2020200021 in words is "two billion, twenty million, two hundred thousand, twenty-one".