A prime number is a natural number, greater than one, that can only be divided by 1 and itself.
The number 2011440 can be evenly divided by 1 2 3 4 5 6 8 10 12 15 16 17 20 24 29 30 34 40 48 51 58 60 68 80 85 87 102 116 120 136 145 170 174 204 232 240 255 272 289 290 340 348 408 435 464 493 510 578 580 680 696 816 867 870 986 1,020 1,156 1,160 1,360 1,392 1,445 1,479 1,734 1,740 1,972 2,040 2,312 2,320 2,465 2,890 2,958 3,468 3,480 3,944 4,080 4,335 4,624 4,930 5,780 5,916 6,936 6,960 7,395 7,888 8,381 8,670 9,860 11,560 11,832 13,872 14,790 16,762 17,340 19,720 23,120 23,664 25,143 29,580 33,524 34,680 39,440 41,905 50,286 59,160 67,048 69,360 83,810 100,572 118,320 125,715 134,096 167,620 201,144 251,430 335,240 402,288 502,860 670,480 1,005,720 and 2,011,440, with no remainder.
Since 2,011,440 cannot be divided by just 1 and 2,011,440, it is not a prime number.