Nevermind, I found out how to do it. In the grid:

columns.Bound(p => p.ProductionLogID).Title("ID").Width(200)
                .Filterable(f => f.Cell(cell => cell.Template("IDFilter").ShowOperators(true)));

In javascript:

function IDFilter(e) {
    e.element.kendoNumericTextBox({format:"#"});
}