Answer
$14,472,844$
Work Step by Step
Using the table and that the place values are $1,20,18\cdot20=360,18\cdot20^2=7200,18\cdot20^3=144000, 18\cdot20^4=2,880,000$:
The numerical value as a Hindu- Arabic numeral is: $5\cdot2,880,000+0\cdot144000+10\cdot7200+2\cdot360+6\cdot20+4\cdot1=14,400,000+0+72000+720+120+4=14,472,844$