JavaScript one line solution !
\nvar kthLargestNumber = (nums, k) => nums.map(BigInt).sort((a,b)=>b-a>=0?1:-1)[k-1]+"";\n
```\nvar kthLargestNumber = (nums, k) => nums.map(BigInt).sort((a,b)=>b-a>=0?1:-1)[k-1]+"";\n```
['JavaScript']