204404320009 has 2 divisors, whose sum is σ = 204404320010. Its totient is φ = 204404320008.

The previous prime is 204404319989. The next prime is 204404320069. The reversal of 204404320009 is 900023404402.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 165258510400 + 39145809609 = 406520^2 + 197853^2 .

It is a cyclic number.

It is not a de Polignac number, because 204404320009 - 2³¹ = 202256836361 is a prime.

It is a super-2 number, since 2×204404320009² (a number of 23 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (204404320069) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 102202160004 + 102202160005.

It is an arithmetic number, because the mean of its divisors is an integer number (102202160005).

Almost surely, 2^204404320009 is an apocalyptic number.

It is an amenable number.

204404320009 is a deficient number, since it is larger than the sum of its proper divisors (1).

204404320009 is an equidigital number, since it uses as much as digits as its factorization.

204404320009 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 6912, while the sum is 28.

The spelling of 204404320009 in words is "two hundred four billion, four hundred four million, three hundred twenty thousand, nine".