2,070,083,810
2,070,173,800
2,070,173,810
Assuming those were added, the standard form is: 2,070,173,810
Each of those numbers already is in standard form.
replace the final 3 zeros with 810
70000000 + 7000000 + 70000 + 9000 + 100 + 1
2,500,070,207
372,512,805
2,070,110,810
2070173810
Assuming those were added, the standard form is: 2,070,173,810
309,512,805