Kamila's triangle of odd numbers

Kamilla constructs the following triangle of positive odd numbers:

$\begin{array} { l l l l l } 1 \\ 3 & 5 \\ 7 & 9 & 11 \\ 13 & 15 & 17 & 19 \\ \end{array}$

On which row will the number 2013 appear?

This problem is shared by Kamilla L.

Details and assumptions

The pattern of the triangle is that there are $n$ numbers in the $n$th row and that each entry is 2 more than the previous value.

The numbers $13, 15, 17$ and 19 appear in the 4th row.