Is a supercomputer more powerful than the total of all the world's computers in 2004?
No, and not by a long way.

Take 25,000,000 ordinary desktop PCs from 2004.  To exceed the supercomputer you're talking about, each would need an 88megaflop CPU, 40Mb of memory and a 940Mb hard disk. In 2004, CPU clock frequencies were already in the GHz range, RAM in the hundreds of megabytes and hard drives in the gigabyte range. And there were many more than 25,000,000 computers in the USA, let alone the world.