What 1 millón times 500 trillion

1,000,000 x 500,000,000,000,000 = 500,000,000,000,000,000,000

500 Quintillion

$1 \, million \, \times \, 500 \, trillion = (1 \times 10^6) \times (500 \times 10^{12}) \\ = (1 \times 10^6) \times (5 \times 10^{14}) = (5 \times 10^{20})$

(scientific notation)