20104234430209 has 2 divisors, whose sum is σ = 20104234430210. Its totient is φ = 20104234430208.

The previous prime is 20104234430183. The next prime is 20104234430213. The reversal of 20104234430209 is 90203443240102.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 10312466957809 + 9791767472400 = 3211303^2 + 3129180^2 .

It is a cyclic number.

It is not a de Polignac number, because 20104234430209 - 2⁵ = 20104234430177 is a prime.

It is not a weakly prime, because it can be changed into another prime (20104234430239) 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 as a sum of consecutive naturals, namely, 10052117215104 + 10052117215105.

It is an arithmetic number, because the mean of its divisors is an integer number (10052117215105).

Almost surely, 2^{20104234430209} is an apocalyptic number.

It is an amenable number.

20104234430209 is a deficient number, since it is larger than the sum of its proper divisors (1).

20104234430209 is an equidigital number, since it uses as much as digits as its factorization.

20104234430209 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 41472, while the sum is 34.

The spelling of 20104234430209 in words is "twenty trillion, one hundred four billion, two hundred thirty-four million, four hundred thirty thousand, two hundred nine".