the best estimate for 18,423,850 is __ million

Answer 1

To estimate 18,423,850 in millions, you can divide by 1,000,000.

So:

18,423,850 ÷ 1,000,000 = 18.42385 million.

Rounding to the nearest whole number, the best estimate for 18,423,850 is approximately 18 million.