18629

18629 is a number with several interesting mathematical properties. It is a composite number, meaning it has factors other than 1 and itself. Its prime factorization is 3^2 × 7 × 11 × 13, indicating that it is the product of these prime numbers. The sum of its digits is 18 (1+8+6+2+9), which is also a composite number. In base 10, 18629 is a palindromic number, reading the same forwards and backwards. It is also a sphenic number, as it is the product of three distinct prime numbers. Additionally, 18629 is a nontrivial repunit nonfactorizable, meaning it cannot be divided evenly by any repunit (a number consisting of repeated 1s) other than 1 and itself. The number 18629 appears in the sequence of Fibonacci numbers, being the sum of the 14th and 15th Fibonacci numbers. In the context of the UPC barcode system, 18629 is a valid number, used for encoding products. However, it is not assigned to any specific product or company. In recreational mathematics, 18629 is a Harshad number, meaning it is divisible by the sum of its digits. It is also a practical number, as all smaller positive integers can be formed by combining its prime factors in different ways. The number 18629 does not have any known special mathematical significance beyond these properties.