Octillion

Decimal system is a way of writing numbers. Any number, from huge quantities to tiny fractions, can be written in the decimal system using only the… See more » Numeration systems are ways of counting and of naming numbers. They are also called numeral systems. We cannot see or touch numbers, because they… See more » Number and numeral. A number is an idea that is used to refer to amounts of things. People use number words, number gestures, and number symbols.… See more »