2020020505 has 4 divisors (see below), whose sum is σ = 2424024612. Its totient is φ = 1616016400.

The previous prime is 2020020493. The next prime is 2020020533. The reversal of 2020020505 is 5050200202.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 5050200202 = 2 ⋅2525100101.

It can be written as a sum of positive squares in 2 ways, for example, as 1052872704 + 967147801 = 32448^2 + 31099^2 .

It is not a de Polignac number, because 2020020505 - 2⁷ = 2020020377 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 202002046 + ... + 202002055.

It is an arithmetic number, because the mean of its divisors is an integer number (606006153).

Almost surely, 2^2020020505 is an apocalyptic number.

It is an amenable number.

2020020505 is a deficient number, since it is larger than the sum of its proper divisors (404004107).

2020020505 is an equidigital number, since it uses as much as digits as its factorization.

2020020505 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 404004106.

The product of its (nonzero) digits is 200, while the sum is 16.

The square root of 2020020505 is about 44944.6382230406. The cubic root of 2020020505 is about 1264.1111421609. Note that the first 4 decimals are identical.

Adding to 2020020505 its reverse (5050200202), we get a palindrome (7070220707).

The spelling of 2020020505 in words is "two billion, twenty million, twenty thousand, five hundred five".