In between the 20 and the three zeroes. So it should look like this: 20,000.
Commas are used to delineate every third (thousands)digit. Full stops/periods are only used to separate digits from decimals. e,g 123456789 Commas. 123,456,789 ; said as 'One hundred and twenty three million, four hundred and fifty six thousand, seven hundred and eighty nine. Decimal 123,456.789 ; said as ' One hundred and twenty three thousand, four hundred and fifty six, point seven eight nine'..
Twenty-four thousand.
79000
That is the correct spelling of the number 50,020. Either "fifty thousand twenty" or "fifty thousand and twenty."
commas go after question marks
Jimmy, closed his eyes and counted to twenty
"Ten thousand to twenty thousand"
twenty-five thousand
Oh, dude, you write 21 million 521 thousand 21 as 21,521,021. It's like counting to a really big number but with commas to make it look fancy. So, just slap those commas in there and you're good to go!
4000
Forty-nine thousand,twenty
Forty-one thousand, twenty