204342650209 has 2 divisors, whose sum is σ = 204342650210. Its totient is φ = 204342650208.

The previous prime is 204342650201. The next prime is 204342650231. The reversal of 204342650209 is 902056243402.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 174189369600 + 30153280609 = 417360^2 + 173647^2 .

It is a cyclic number.

It is not a de Polignac number, because 204342650209 - 2³ = 204342650201 is a prime.

It is not a weakly prime, because it can be changed into another prime (204342650201) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 102171325104 + 102171325105.

It is an arithmetic number, because the mean of its divisors is an integer number (102171325105).

Almost surely, 2^204342650209 is an apocalyptic number.

It is an amenable number.

204342650209 is a deficient number, since it is larger than the sum of its proper divisors (1).

204342650209 is an equidigital number, since it uses as much as digits as its factorization.

204342650209 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 103680, while the sum is 37.

The spelling of 204342650209 in words is "two hundred four billion, three hundred forty-two million, six hundred fifty thousand, two hundred nine".