2020440209 has 2 divisors, whose sum is σ = 2020440210. Its totient is φ = 2020440208.

The previous prime is 2020440203. The next prime is 2020440239. The reversal of 2020440209 is 9020440202.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1941283600 + 79156609 = 44060^2 + 8897^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2020440209 is a prime.

It is not a weakly prime, because it can be changed into another prime (2020440203) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1010220104 + 1010220105.

It is an arithmetic number, because the mean of its divisors is an integer number (1010220105).

Almost surely, 2^2020440209 is an apocalyptic number.

It is an amenable number.

2020440209 is a deficient number, since it is larger than the sum of its proper divisors (1).

2020440209 is an equidigital number, since it uses as much as digits as its factorization.

2020440209 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1152, while the sum is 23.

The square root of 2020440209 is about 44949.3071025572. The cubic root of 2020440209 is about 1264.1986851274.

The spelling of 2020440209 in words is "two billion, twenty million, four hundred forty thousand, two hundred nine".