There are two correct answers to this question:
15 (in the USA and in any countries that use "short scale" naming conventions)
Or
24 (in countries that use "long scale" naming conventions)
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The scales goes as follows:
Value in
Scientific notation
| Short Scale Name |
| Value in numerals
Long Scale Name
10 01oneone
10 31,000thousandthousand
10 61,000,000millionmillion
10 91,000,000,000billionthousand million or milliard
10121,000,000,000,000trillionbillion
10151,000,000,000,000,000quadrillionthousand billion or billiard
10181,000,000,000,000,000,000quintilliontrillion
10211,000,000,000,000,000,000,000sextillionthousand trillion or trilliard
10241,000,000,000,000,000,000,000,000septillionquadrillion
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The number one million (1,000,000) is one followed by six zeroes.
One quadrillion.
There are eight zeroes in 3.9 billion. This number is written as 3,900,000,000 in numerical value. One billion has nine zeroes.
One googol is a 1 followed by 100 zeroes.
A googol is the number 1 followed by one hundred zeroes, and a googolplex is the number 1 followed by a googol zeroes. A googolplexplex is the number 1 followed by a googolplex zeroes, and so on.
A number that has `15 zeroes is called a quadrillion. For example, one quadrillion is written as 1,000,000,000,000,000. A number that has 18 zeroes would be a quintillion.
One quadrillion = 1,000,000,000,000,000There's 15 zeroes in one quadrillion.
One million billion is also known as a Quadrillion. This is a number, followed by 15 zeroes. 1,000,000,000,000,000 is a Quadrillion.
A thousand trillion is one quadrillion. You can figure this out by knowing the numbers of zeroes are in a trillion, which are 12. Since 1000 has three zeroes, 1000 trillion is 10 to the power of 15, which also represents one quadrillion.
One million billion is also known as a Quadrillion. This is a number, followed by 15 zeroes. 1,000,000,000,000,000 is a Quadrillion.
The number one quadrillion has 15 zeroes in the short scale and 24 zeroes in the long scale. Adding three zeroes in the short scale gives one quintillion. In the short scale, this is 1 followed by 18 zeroes (1,000,000,000,000,000,000), while in the long scale, this is 1 followed by 30 zeroes (1,000,000,000,000,000,000,000,000,000,000).
One quadrillion and one!
The power of one thousand or one million that immediately follows trillion is quadrillion. In United States and modern British usage, this contains 15 zeroes. In traditional British and continental European usage, this contains 24 zeroes.
A quadrillion and one.
Quadrillion and one would be the next number.
One quadrillion
sixty-three trillion - 63 with twelve zeros. Here's a fun list I yanked from Yahoo answers. million: six zeroes billion: nine zeroes trillion: twelve zeroes quadrillion: fifteen zeroes quintillion: eighteen zeroes sextillion: twenty-one zeroes septillion: twenty-four zeroes octillion: twenty-seven zeroes novillion: thirty zeroes decillion: thirty-three zeroes undecillion: thirty-six zeroes duodecillion: thirty-nine zeroes tredecillion: forty-two zeroes quattuordecillion: forty-five zeroes quindecillion: forty-eight zeroes sexdecillion: fifty-one zeroes septendecillion: fifty-four zeroes octodecillion: fifty-seven zeroes novemdecillion: sixty zeroes vigintillion: sixty-three zeroes