2020311305 has 4 divisors (see below), whose sum is σ = 2424373572. Its totient is φ = 1616249040.

The previous prime is 2020311257. The next prime is 2020311311. The reversal of 2020311305 is 5031130202.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 409171984 + 1611139321 = 20228^2 + 40139^2 .

It is not a de Polignac number, because 2020311305 - 2⁸ = 2020311049 is a prime.

It is a super-2 number, since 2×2020311305² = 8163315538221606050, which contains 22 as substring.

It is a Duffinian number.

It is an unprimeable number.

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, 202031126 + ... + 202031135.

It is an arithmetic number, because the mean of its divisors is an integer number (606093393).

Almost surely, 2^2020311305 is an apocalyptic number.

It is an amenable number.

2020311305 is a deficient number, since it is larger than the sum of its proper divisors (404062267).

2020311305 is an equidigital number, since it uses as much as digits as its factorization.

2020311305 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 404062266.

The product of its (nonzero) digits is 180, while the sum is 17.

The square root of 2020311305 is about 44947.8731977387. The cubic root of 2020311305 is about 1264.1717992814.

Adding to 2020311305 its reverse (5031130202), we get a palindrome (7051441507).

The spelling of 2020311305 in words is "two billion, twenty million, three hundred eleven thousand, three hundred five".