How do you read a 20-digit number?

Answer 1

First of all, use commas to separate sets of three numbers starting from the right.

e.g. Take a number like 10, 234,567,809,706,210,345

Are we in the American or British system of counting. I'll assume American.

Starting from the right, the 1st three are hundreds, the next three thousands, the next three millions, then billions, trillions, quadrillions and then quintillions.

So this number is 10 quintillion, 234 quadrillion, 567 trillion, 809 billion, 706 million, 210 thousand, 3 hundred and 45.