Final answer:
The product of all the prime numbers less than 20 is closest to 10^7.
Step-by-step explanation:
The product of all the prime numbers less than 20 can be found by multiplying the prime numbers together: 2 x 3 x 5 x 7 x 11 x 13 x 17 x 19. Let's calculate this product.
2 x 3 = 6
6 x 5 = 30
30 x 7 = 210
210 x 11 = 2310
2310 x 13 = 30030
30030 x 17 = 510510
510510 x 19 = 9699690
The product of all the prime numbers less than 20 is closest to 107.