The number 4,018,500 can be evenly divided by 1 2 3 4 5 6 9 10 12 15 18 19 20 25 30 36 38 45 47 50 57 60 75 76 90 94 95 100 114 125 141 150 171 180 188 190 225 228 235 250 282 285 300 342 375 380 423 450 470 475 500 564 570 684 705 750 846 855 893 900 940 950 1,125 1,140 1,175 1,410 1,425 1,500 1,692 1,710 1,786 1,900 2,115 2,250 2,350 2,375 2,679 2,820 2,850 3,420 3,525 3,572 4,230 4,275 4,465 4,500 4,700 4,750 5,358 5,700 5,875 7,050 7,125 8,037 8,460 8,550 8,930 9,500 10,575 10,716 11,750 13,395 14,100 14,250 16,074 17,100 17,625 17,860 21,150 21,375 22,325 23,500 26,790 28,500 32,148 35,250 40,185 42,300 42,750 44,650 52,875 53,580 66,975 70,500 80,370 85,500 89,300 105,750 111,625 133,950 160,740 200,925 211,500 223,250 267,900 334,875 401,850 446,500 669,750 803,700 1,004,625 1,339,500 2,009,250 and 4,018,500, with no remainder.
Since 4,018,500 cannot be divided by just 1 and 4,018,500, it is a composite number.