204434210117 has 2 divisors, whose sum is σ = 204434210118. Its totient is φ = 204434210116.

The previous prime is 204434210011. The next prime is 204434210153. The reversal of 204434210117 is 711012434402.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 111939761476 + 92494448641 = 334574^2 + 304129^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-204434210117 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 204434210117.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (204434210417) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 102217105058 + 102217105059.

It is an arithmetic number, because the mean of its divisors is an integer number (102217105059).

Almost surely, 2^204434210117 is an apocalyptic number.

It is an amenable number.

204434210117 is a deficient number, since it is larger than the sum of its proper divisors (1).

204434210117 is an equidigital number, since it uses as much as digits as its factorization.

204434210117 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5376, while the sum is 29.

Adding to 204434210117 its reverse (711012434402), we get a palindrome (915446644519).

The spelling of 204434210117 in words is "two hundred four billion, four hundred thirty-four million, two hundred ten thousand, one hundred seventeen".