20202020220209 has 2 divisors, whose sum is σ = 20202020220210. Its totient is φ = 20202020220208.

The previous prime is 20202020220199. The next prime is 20202020220211. The reversal of 20202020220209 is 90202202020202.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 20194777699600 + 7242520609 = 4493860^2 + 85103^2 .

It is a cyclic number.

It is not a de Polignac number, because 20202020220209 - 2²⁴ = 20202003442993 is a prime.

Together with 20202020220211, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (20202020220259) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10101010110104 + 10101010110105.

It is an arithmetic number, because the mean of its divisors is an integer number (10101010110105).

Almost surely, 2^{20202020220209} is an apocalyptic number.

It is an amenable number.

20202020220209 is a deficient number, since it is larger than the sum of its proper divisors (1).

20202020220209 is an equidigital number, since it uses as much as digits as its factorization.

20202020220209 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 spelling of 20202020220209 in words is "twenty trillion, two hundred two billion, twenty million, two hundred twenty thousand, two hundred nine".