2020507009 has 4 divisors (see below), whose sum is σ = 2038387716. Its totient is φ = 2002626304.

The previous prime is 2020507003. The next prime is 2020507031. The reversal of 2020507009 is 9007050202.

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 803892609 + 1216614400 = 28353^2 + 34880^2 .

It is a cyclic number.

It is not a de Polignac number, because 2020507009 - 2²³ = 2012118401 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2020507003) 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 in 3 ways as a sum of consecutive naturals, for example, 8940184 + ... + 8940409.

It is an arithmetic number, because the mean of its divisors is an integer number (509596929).

Almost surely, 2^2020507009 is an apocalyptic number.

It is an amenable number.

2020507009 is a deficient number, since it is larger than the sum of its proper divisors (17880707).

2020507009 is a wasteful number, since it uses less digits than its factorization.

2020507009 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17880706.

The product of its (nonzero) digits is 1260, while the sum is 25.

The square root of 2020507009 is about 44950.0501557006. The cubic root of 2020507009 is about 1264.2126173291.

The spelling of 2020507009 in words is "two billion, twenty million, five hundred seven thousand, nine".