The initial number followed by nine(9) digits.
e.g.
1,234,567,890
One. ("Billion" IS the number in this case.)
a billion numbers
10 numbers in a billion
there are 12 numbers for billion
There are nine zeros in one billion.
10
11
In Numbers: 1,000,000,000
Ten
9, as 1 billion is considered a thousand '1 million'
It is important to know how many zeroes are in numbers. 8.22 billion is 8,220,000,000 which means there are seven zeroes.
Expressed in numbers, this is equal to 100,000,000,000,000,000,000, or 1 followed by 20 zeroes.
If you mean how many digits does a billion have, then one billion = 1,000,000,000 which is one, followed by 9 zeros, or ten digits