Have ever wondered how many zeroes are in a million? A billion? A trillion? Do you know how many zeros there are in a vigintillion? Someday you may need to know this for science or math class. Then again, you might just want to impress a friend or teacher.
The digit zero plays an important role as you count very large numbers. It helps track these multiples of 10 because the larger the number is, the more zeroes are needed.
In the table below, the first column lists the name of the number, the second provides the number of zeros that follow the initial digit, and the third tells you how many groups of three zeros you would need to write out each number. A table like the one above can certainly be helpful in listing the names of all of the numbers depending on how many zeros they have. But it can be really mind-boggling to see just what some of those numbers look like. Below is a listing—including all the zeros—for the numbers up to decillion—a little more than just half the numbers listed in the above table.
Ten: 10 1 zero Hundred: 2 zeros Thousand: 3 zeros Ten thousand 10, 4 zeros Hundred thousand , 5 zeros Million 1,, 6 zeros Billion 1,,, 9 zeros Trillion 1,,,, 12 zeros Quadrillion 1,,,,, 15 zeros Quintillion 1,,,,,, 18 zeros Sextillion 1,,,,,,, 21 zeros Septillion 1,,,,,,,, 24 zeros Octillion 1,,,,,,,,, 27 zeros Nonillion 1,,,,,,,,,, 30 zeros Decillion 1,,,,,,,,,,, 33 zeros. Reference to sets of zeros is reserved for groupings of three zeros , meaning they are not relevant for smaller numbers.
We write numbers with commas separating sets of three zeros so that it's easier to read and understand the value. For example, you write one million as 1,, rather than As another example, it's much easier to remember that a trillion is written with four sets of three zeros than it is to count out 12 separate zeroes. While you might think that that one is pretty simple, just wait until you have to count 27 zeros for an octillion or zeros for a centillion.
It is then that you will be thankful that you only have to remember nine and sets of zeros, respectively. The number googol termed by Milton Sirotta has zeros after it. Here's what a googol looks like, including all of its required zeros:. More important than the names is knowing how to think about large numbers. To be a well-informed member of society, we really should be able to know how big numbers like a billion and trillion really are.
It helps to make this identification personal. Have fun coming up with your own concrete ways to talk about the magnitude of these numbers.
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