Ten thousand.
There are 4 billion/10 million = 400 of them.
30,000 millions.
millions
If a hundred million is 100,000,000, and 1 billion is 1,000,000,000, then the answer is 10.
trillions and billions beyond that
2000
1,600
Probably millions or billions.
6,000
trillions, billions, quadrillions, millions, there are many more that scientists have not discovered.
mil. = millions bil. = billions
2000millions