A prime number is a natural number, greater than one, that can only be divided by 1 and itself.
The number 2002320 can be evenly divided by 1 2 3 4 5 6 8 9 10 12 15 16 18 20 24 27 30 36 40 45 48 54 60 72 80 81 90 103 108 120 135 144 162 180 206 216 240 243 270 309 324 360 405 412 432 486 515 540 618 648 720 810 824 927 972 1,030 1,080 1,215 1,236 1,296 1,545 1,620 1,648 1,854 1,944 2,060 2,160 2,430 2,472 2,781 3,090 3,240 3,708 3,888 4,120 4,635 4,860 4,944 5,562 6,180 6,480 7,416 8,240 8,343 9,270 9,720 11,124 12,360 13,905 14,832 16,686 18,540 19,440 22,248 24,720 25,029 27,810 33,372 37,080 41,715 44,496 50,058 55,620 66,744 74,160 83,430 100,116 111,240 125,145 133,488 166,860 200,232 222,480 250,290 333,720 400,464 500,580 667,440 1,001,160 and 2,002,320, with no remainder.
Since 2,002,320 cannot be divided by just 1 and 2,002,320, it is not a prime number.