strtoi(x,base=36) will convert a base36-encoded string to an integer:
strtoi("zzzz",base=36)
[1] 1679615
Is there a function that inverts this operation, i.e., given a positive integer yields the base36 equivalent? Essentially, I'm looking for an itostr() function such that
itostr(1679615,base=36)
[1] "zzzz"
(I don't need any base other than 36, but a base argument would be nice to have.)