19840

19840 is a natural number that follows 19839 and precedes 19841. In mathematics, it is an even composite number. Its prime factorization is 2^7 × 5 × 31, which gives a total of 32 positive divisors. It is divisible by 2, 4, 5, 8, 10, 16, 20, 32, 40, 64, 80, 128, and other combinations arising from the factors 2, 5, and 31. The largest power of two dividing 19840 is 2^7, since 19840 ÷ 128 = 155 is odd. The number can be expressed as 31 × 640 and also as 5 × 3968.

In different numeral systems, 19840 is written as 100110110000000 in binary and as 0x4D80 in hexadecimal. It is not a prime, not a square, and not a palindrome in base ten. Its decimal digit sum is 1+9+8+4+0 = 22, so it is not divisible by 3; its remainder modulo 9 is 4.

In practical use, 19840 may appear as a numeric identifier, a count, or a measurement in various catalogs, datasets, or product codes. There is no widely recognized entity specifically associated with 19840; rather, it is one of many natural numbers used to illustrate factors, divisibility, and numeral representations.