2020321 has 2 divisors, whose sum is σ = 2020322. Its totient is φ = 2020320.

The previous prime is 2020313. The next prime is 2020387. The reversal of 2020321 is 1230202.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1347921 + 672400 = 1161^2 + 820^2 .

It is a cyclic number.

It is not a de Polignac number, because 2020321 - 2³ = 2020313 is a prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 2020298 and 2020307.

It is not a weakly prime, because it can be changed into another prime (2020391) 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 as a sum of consecutive naturals, namely, 1010160 + 1010161.

It is an arithmetic number, because the mean of its divisors is an integer number (1010161).

2^2020321 is an apocalyptic number.

It is an amenable number.

2020321 is a deficient number, since it is larger than the sum of its proper divisors (1).

2020321 is an equidigital number, since it uses as much as digits as its factorization.

2020321 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 24, while the sum is 10.

The square root of 2020321 is about 1421.3799632751. The cubic root of 2020321 is about 126.4173821433.

Adding to 2020321 its reverse (1230202), we get a palindrome (3250523).

The spelling of 2020321 in words is "two million, twenty thousand, three hundred twenty-one".