AWK Convert Decimal to Binary

I want to use AWK to convert a list of decimal numbers in a file to binary but there seems to be no built-in method. Sample file is as below:

134218506
134218250
134217984
1610612736
16384
33554432

Here is an awk way, functionized for your pleasure:

awk '
function d2b(d,  b) {
    while(d) {
        b=d%2b
        d=int(d/2)
    }
    return(b?b:0)
}
{
    print d2b($0)
}' file

Output of the first three records:

1000000000000000001100001010
1000000000000000001000001010
1000000000000000000100000000

Output for 0, -1 and -2:

0
-1
-10