204433312009 has 2 divisors, whose sum is σ = 204433312010. Its totient is φ = 204433312008.

The previous prime is 204433312003. The next prime is 204433312043. The reversal of 204433312009 is 900213334402.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 204430579600 + 2732409 = 452140^2 + 1653^2 .

It is a cyclic number.

It is not a de Polignac number, because 204433312009 - 2³ = 204433312001 is a prime.

It is not a weakly prime, because it can be changed into another prime (204433312001) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 102216656004 + 102216656005.

It is an arithmetic number, because the mean of its divisors is an integer number (102216656005).

Almost surely, 2^204433312009 is an apocalyptic number.

It is an amenable number.

204433312009 is a deficient number, since it is larger than the sum of its proper divisors (1).

204433312009 is an equidigital number, since it uses as much as digits as its factorization.

204433312009 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 15552, while the sum is 31.

The spelling of 204433312009 in words is "two hundred four billion, four hundred thirty-three million, three hundred twelve thousand, nine".