The value of avogadro number is : 6.022140857e+23.
One million is: 1.0e+6
The time will be: 6.022140857e+17 seconds, if 1 million is spent every second, calculated by basic elementary method.
This time when converted to years computes to be: 19096083523.592086792 years.
Hope this answers your query.
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