204434210417 has 2 divisors, whose sum is σ = 204434210418. Its totient is φ = 204434210416.

The previous prime is 204434210369. The next prime is 204434210429. The reversal of 204434210417 is 714012434402.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 202118579776 + 2315630641 = 449576^2 + 48121^2 .

It is a cyclic number.

It is not a de Polignac number, because 204434210417 - 2⁶ = 204434210353 is a prime.

It is not a weakly prime, because it can be changed into another prime (204434210117) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 102217105208 + 102217105209.

It is an arithmetic number, because the mean of its divisors is an integer number (102217105209).

Almost surely, 2^204434210417 is an apocalyptic number.

It is an amenable number.

204434210417 is a deficient number, since it is larger than the sum of its proper divisors (1).

204434210417 is an equidigital number, since it uses as much as digits as its factorization.

204434210417 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 21504, while the sum is 32.

Adding to 204434210417 its reverse (714012434402), we get a palindrome (918446644819).

The spelling of 204434210417 in words is "two hundred four billion, four hundred thirty-four million, two hundred ten thousand, four hundred seventeen".