204043340009 has 2 divisors, whose sum is σ = 204043340010. Its totient is φ = 204043340008.

The previous prime is 204043339999. The next prime is 204043340077. The reversal of 204043340009 is 900043340402.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 196118779609 + 7924560400 = 442853^2 + 89020^2 .

It is a cyclic number.

It is not a de Polignac number, because 204043340009 - 2²⁰ = 204042291433 is a prime.

It is not a weakly prime, because it can be changed into another prime (204043300009) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 102021670004 + 102021670005.

It is an arithmetic number, because the mean of its divisors is an integer number (102021670005).

Almost surely, 2^204043340009 is an apocalyptic number.

It is an amenable number.

204043340009 is a deficient number, since it is larger than the sum of its proper divisors (1).

204043340009 is an equidigital number, since it uses as much as digits as its factorization.

204043340009 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 10368, while the sum is 29.

The spelling of 204043340009 in words is "two hundred four billion, forty-three million, three hundred forty thousand, nine".