204741221873 has 2 divisors, whose sum is σ = 204741221874. Its totient is φ = 204741221872.

The previous prime is 204741221837. The next prime is 204741221891. The reversal of 204741221873 is 378122147402.

Together with previous prime (204741221837) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 135491720464 + 69249501409 = 368092^2 + 263153^2 .

It is a cyclic number.

It is not a de Polignac number, because 204741221873 - 2¹² = 204741217777 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 204741221873.

It is not a weakly prime, because it can be changed into another prime (204741221173) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 102370610936 + 102370610937.

It is an arithmetic number, because the mean of its divisors is an integer number (102370610937).

Almost surely, 2^204741221873 is an apocalyptic number.

It is an amenable number.

204741221873 is a deficient number, since it is larger than the sum of its proper divisors (1).

204741221873 is an equidigital number, since it uses as much as digits as its factorization.

204741221873 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 150528, while the sum is 41.

The spelling of 204741221873 in words is "two hundred four billion, seven hundred forty-one million, two hundred twenty-one thousand, eight hundred seventy-three".