I read somewhere in the internet, that the capacity of all computers in the world would be about $10^{18}$ bytes.
Does this mean, that in principle, a number with $10^{18}$ digits could be written down using all computers in the world ?
I do not know, if the data can be stored because it would have to be on ONE computer at the end. This is why I doubt that $10^{18}$ is possible.
On the other hand, $\pi$ has been calculated to more than $10^{12}$ digits. ( I do not know the exact value, it could be in the range of $10^{15}$) Are these digits availabe on any single computer ?
And finally, if more than a single computer calculated $\pi$, how could they work together to manage this task ?