204705513913 has 2 divisors, whose sum is σ = 204705513914. Its totient is φ = 204705513912.

The previous prime is 204705513907. The next prime is 204705513953. The reversal of 204705513913 is 319315507402.

It is an a-pointer prime, because the next prime (204705513953) can be obtained adding 204705513913 to its sum of digits (40).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 204242532624 + 462981289 = 451932^2 + 21517^2 .

It is a cyclic number.

It is not a de Polignac number, because 204705513913 - 2¹⁷ = 204705382841 is a prime.

It is not a weakly prime, because it can be changed into another prime (204705513953) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 102352756956 + 102352756957.

It is an arithmetic number, because the mean of its divisors is an integer number (102352756957).

Almost surely, 2^204705513913 is an apocalyptic number.

It is an amenable number.

204705513913 is a deficient number, since it is larger than the sum of its proper divisors (1).

204705513913 is an equidigital number, since it uses as much as digits as its factorization.

204705513913 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 113400, while the sum is 40.

The spelling of 204705513913 in words is "two hundred four billion, seven hundred five million, five hundred thirteen thousand, nine hundred thirteen".