How is the usage of a content distributor like Akamai, going to affect our website rankings?

Currently, we host all our 20 domains (20 different websites) on a single IP server.

How is Google going to behave, seing our usual 20 domains served in a few weeks of time from about 16,000+ IP addresses around the world, where our sites can be accessed - (basically many IP's in every single country)?

Will the usual Google ranking be affected? In good or in bad?

Will we also have the effect of "fooling" Google geotargeting (based on IP)?