Taking into account the Gregorian leap year rules there are
146,097 days in 400 years
the calendar repeats itself only after 400 years
2000 / 400 = 5 repetitions evenly
that's 146,097 days x 5 repetitions = 730,485 days in 2000 years
there are 86,400 seconds in a day hence
730,485 days x 86,400 sec/day = 63,113,904,000 seconds in 2000 years
63115200000 seconds
31507600 seconds in a year x 2000= 63015200000(six quadrillion three hundred one trillion five hundred twenty billion)
2000
16 years = 504,910,816 seconds.
There are 1,452,576,000 seconds in 46 years.
2,000 hours is 7,200,000 seconds.
There are 1,358,724,800 seconds in 43 years.
There are 1263141040 seconds in 40 years
10 years = 315,569,260 seconds.
About 1,009,843,200 seconds in 32 years.
10 years = 315,569,260 seconds.
20 years = 631,138,519 seconds.