243 is somewhere between 580 and 620 if it is on paper-based.
I think that is good enough for most top 20. your background, your essay, your interview are more important than Toefl, sometimes even more important than your GMAT
I suggest you re-take it because most school expect international applicants have at least 250 points in TOEFL test and some even require your every sub-score at least is 25. I also got 22 points in listenning section of first test although total score is above 250, but got 27 points in second test after practicing DELTA KEY software, a good tool of TOEFL preparation, so I suggest you download it from chasedream and practice to improve your listenning ability. good luck!