204354445354219 has 2 divisors, whose sum is σ = 204354445354220. Its totient is φ = 204354445354218.

The previous prime is 204354445354201. The next prime is 204354445354229. The reversal of 204354445354219 is 912453544453402.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 204354445354219 - 2⁵ = 204354445354187 is a prime.

It is a super-2 number, since 2×204354445354219² (a number of 29 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 204354445354219.

It is not a weakly prime, because it can be changed into another prime (204354445354229) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (31) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 102177222677109 + 102177222677110.

It is an arithmetic number, because the mean of its divisors is an integer number (102177222677110).

Almost surely, 2^{204354445354219} is an apocalyptic number.

204354445354219 is a deficient number, since it is larger than the sum of its proper divisors (1).

204354445354219 is an equidigital number, since it uses as much as digits as its factorization.

204354445354219 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 41472000, while the sum is 55.

The spelling of 204354445354219 in words is "two hundred four trillion, three hundred fifty-four billion, four hundred forty-five million, three hundred fifty-four thousand, two hundred nineteen".