Fifteen
The number 90 is written out in words as such: ninety. You should spell out a number rather than write it in number form in particular scenarios, such as if you are beginning a sentence with a number.
Forty million
The number 400 is written in words as four hundred.
ten trillion
Eighteen billion.
18,000,000,000 | eighteen billion.
Eighteen billion.
Nine hundred ninety-nine billion, nine hundred ninety-nine million.
It is: 1.8*1010
27,254.9702 times.
You write the number in words >:D
Write out the number 32 as thirty two (in words).
You write it: twelve
So for example if you wanted to write 4 in words it would be four.
The scientific notation is 1.8 x 1010, and this is pronounced "one point eight times 10 to the 10th power." This is number can also be called 18 billion.
Fifteen