1000000000000000000

1000000000000000000 is the decimal numeral for 10^18, an integer consisting of 19 digits. It is a round major power of ten and serves as a convenient reference point in mathematics and science.

In the short scale used by most English-language contexts, 10^18 is called one quintillion; in the long scale previously used in some European countries, it would be called a trillion.

In data storage, 10^18 bytes equals one exabyte (EB) in decimal terms; in binary units, 2^60 bytes equal one exbibyte (EiB), so one exabyte is about 0.87 EiB.

In time, 10^18 seconds is about 31.7 billion years, well beyond the age of the universe.

As a numerical benchmark, 10^18 represents a naturally occurring milestone in mathematics and is widely used to illustrate large-scale quantities in computing, science, and finance.