How is 2000 a memorable number?

In: Math and Arithmetic, Decade - 2000s [Edit categories]

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Related answers:

How do you write 2000 in numeric numbers? 2000
Is 2000 a square number? No.
What number squared is closest to 2000? Do you mean, what integer? Then, the answer is 45. 45² = 2,025, which is just a little...
2000 is a four significant number? The number "2000" has one significant figure. -Any number that is not zero is significant....