20398

20398 is a natural number that sits between 20397 and 20399. It is even and composite, and it is square-free, since its prime factorization consists of four distinct primes: 2, 7, 31, and 47. Therefore, 20398 = 2 × 7 × 31 × 47. It is also a deficient number, meaning the sum of its proper divisors is less than the number itself (the sum of divisors is 3 × 8 × 32 × 48 = 36864, so proper divisors sum to 36864 − 20398 = 16466).

In decimal form, the digits of 20398 are 2, 0, 3, 9, and 8, with a digit sum of 22. In other base representations, it equals 100111110101110 in binary and 0x4FAE in hexadecimal, reflecting its 16-bit binary form as 0100 1111 1010 1110.

Due to its factorization, 20398 is divisible by several smaller integers, including 2, 7, 14, 31, 47, and 658 (since 2 × 7 × 47 = 658). Beyond these structural characteristics, 20398 is primarily of interest as a representative example of a five-digit, even, square-free, deficient composite number in arithmetic discussions and numerical datasets. It does not represent a widely known constant or widely recognized historical year.