2020244021 has 2 divisors, whose sum is σ = 2020244022. Its totient is φ = 2020244020.

The previous prime is 2020243999. The next prime is 2020244047. The reversal of 2020244021 is 1204420202.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1806675025 + 213568996 = 42505^2 + 14614^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2020244021 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2020244221) 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 as a sum of consecutive naturals, namely, 1010122010 + 1010122011.

It is an arithmetic number, because the mean of its divisors is an integer number (1010122011).

Almost surely, 2^2020244021 is an apocalyptic number.

It is an amenable number.

2020244021 is a deficient number, since it is larger than the sum of its proper divisors (1).

2020244021 is an equidigital number, since it uses as much as digits as its factorization.

2020244021 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 256, while the sum is 17.

The square root of 2020244021 is about 44947.1247245027. The cubic root of 2020244021 is about 1264.1577652264.

Adding to 2020244021 its reverse (1204420202), we get a palindrome (3224664223).

The spelling of 2020244021 in words is "two billion, twenty million, two hundred forty-four thousand, twenty-one".