20002011209 has 2 divisors, whose sum is σ = 20002011210. Its totient is φ = 20002011208.

The previous prime is 20002011187. The next prime is 20002011241. The reversal of 20002011209 is 90211020002.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 16775430400 + 3226580809 = 129520^2 + 56803^2 .

It is a cyclic number.

It is not a de Polignac number, because 20002011209 - 2⁸ = 20002010953 is a prime.

It is not a weakly prime, because it can be changed into another prime (20002011259) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10001005604 + 10001005605.

It is an arithmetic number, because the mean of its divisors is an integer number (10001005605).

Almost surely, 2^20002011209 is an apocalyptic number.

It is an amenable number.

20002011209 is a deficient number, since it is larger than the sum of its proper divisors (1).

20002011209 is an equidigital number, since it uses as much as digits as its factorization.

20002011209 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 72, while the sum is 17.

The spelling of 20002011209 in words is "twenty billion, two million, eleven thousand, two hundred nine".