2020020305 has 4 divisors (see below), whose sum is σ = 2424024372. Its totient is φ = 1616016240.

The previous prime is 2020020293. The next prime is 2020020311. The reversal of 2020020305 is 5030200202.

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 1576328209 + 443692096 = 39703^2 + 21064^2 .

It is not a de Polignac number, because 2020020305 - 2⁸ = 2020020049 is a prime.

It is a super-2 number, since 2×2020020305² = 8160964065224586050, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 2020020305.

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, 202002026 + ... + 202002035.

It is an arithmetic number, because the mean of its divisors is an integer number (606006093).

Almost surely, 2^2020020305 is an apocalyptic number.

It is an amenable number.

2020020305 is a deficient number, since it is larger than the sum of its proper divisors (404004067).

2020020305 is an equidigital number, since it uses as much as digits as its factorization.

2020020305 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 404004066.

The product of its (nonzero) digits is 120, while the sum is 14.

The square root of 2020020305 is about 44944.6359980810. The cubic root of 2020020305 is about 1264.1111004415. Note that the first 4 decimals are identical.

Adding to 2020020305 its reverse (5030200202), we get a palindrome (7050220507).

The spelling of 2020020305 in words is "two billion, twenty million, twenty thousand, three hundred five".