204321430057 has 2 divisors, whose sum is σ = 204321430058. Its totient is φ = 204321430056.

The previous prime is 204321429971. The next prime is 204321430073. The reversal of 204321430057 is 750034123402.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 142569677056 + 61751753001 = 377584^2 + 248499^2 .

It is a cyclic number.

It is not a de Polignac number, because 204321430057 - 2⁷ = 204321429929 is a prime.

It is not a weakly prime, because it can be changed into another prime (204321430457) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 102160715028 + 102160715029.

It is an arithmetic number, because the mean of its divisors is an integer number (102160715029).

Almost surely, 2^204321430057 is an apocalyptic number.

It is an amenable number.

204321430057 is a deficient number, since it is larger than the sum of its proper divisors (1).

204321430057 is an equidigital number, since it uses as much as digits as its factorization.

204321430057 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 20160, while the sum is 31.

Adding to 204321430057 its reverse (750034123402), we get a palindrome (954355553459).

The spelling of 204321430057 in words is "two hundred four billion, three hundred twenty-one million, four hundred thirty thousand, fifty-seven".