10 B is not an abbreviation of 1 billion. 1,000,000,000 can be abbreviated as 109.
I write 620 billion as 620 billion.
Sixteen point two billion is how I would write it.
You write 3.56 billion as 3,560,000,000.
You can write 40.3 billion as 40,300,000,000.
10 B is not an abbreviation of 1 billion. 1,000,000,000 can be abbreviated as 109.
The common SI prefixes for billion are giga- (symbol: G) which signifies 10^9 and tera- (symbol: T) which denotes 10^12.
It's easier to write something when it is abbreviated, especially when you need to write it many time.
I write 620 billion as 620 billion.
Sixteen point two billion is how I would write it.
You write 3.56 billion as 3,560,000,000.
You can write 40.3 billion as 40,300,000,000.
£6
You can write out 1.8 billion as "1,800,000,000" or "one billion eight hundred million."
Since you asked how I would write the number, the answer is 1031.
1,000 billion billion is: 1,000,000,000,000,000,000,000
35.9204067 billion