numeration
It is called a complex number.
A rational number
The number 400 is written in words as four hundred.
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ten trillion
The number 10,000,000,000,000,000,000,000,000,000,000,000,000,000,000 is written in words as "ten quadrillion."
It is called a complex number.
A rational number
A rational number
A whole number.
Complex
The number 400 is written in words as four hundred.
ninety-nine
Nineteen million.
They are called "compound words."
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epitaph