1,800,000,000 miles
1 billion has nine zeros, so to write 1.8 billion in numbers you would simply need to move the decimal point nine places to the right, which would give you 1,800,000,000.
Two million miles or 2,000,000 miles.
1 billion feet = 189,393.94 miles.
2.8 billion miles = 4,506,163,200 kilometers.
Answer: 1 billion acres = 1,562.5 mi²
There are about: 5/8*5,000,000,000 = 3,125,000,000 miles
Planet Neptune has a surface area of 2.941 billion sq miles (7.618 billion km²).
$18,000,000,000.00 or $18 billion
It is 2660000000 miles.
3,100,000,000 miles or 3.1 × 109 miles
18 billion 796 thousand 013 would be written as: 18,000,796,013.
21,018,000,025
it is written like this 1,000,000,000,000,000,000 but there is no such thing as a billion billion it would have to reach quintillion
42.4 billion * 57 million = 2.4168*10^18.
18,007,193,000
9,018,0046,072
I write 620 billion as 620 billion.
Thusly: 25,718,000,001,064
Sixteen point two billion is how I would write it.