length and alphanumeric formula (quick formula question)

I have 2 columns A and B
Both have similar kind of information (numeric and alpha numeric data with character length going up 60)

I want to filter the data in those 2 columns by max. character length 16 and only alphanumeric data. How do I do it?

Thanks

Thanks ragulduy, great idea!

I used your formula, I moved columns A/B to Q/R
=AND(LEN(Q2)<=16,ISNUMBER(SUM(IF(FIND(MID(Q2,ROW(Q$2:Q$401),1),"0123456789abcdefghijklmnopqrstuvwxyz",1),1,0))),LEN(R2)<=16,ISNUMBER(SUM(IF(FIND(MID(R2,ROW(R$2:R$401),1),"0123456789abcdefghijklmnopqrstuvwxyz",1),1,0))))

it's working for some of the fields and for some it's not.

E.g.
(it's picking false for the following even though it should say True)

PASUPINVHPCM08



What am I doing wrong?

I was able to gifure it out...

alpha numeric:

=AND(SUMPRODUCT(--ISNUMBER(SEARCH(MID(Q2,ROW(INDIRECT("q$2"&LEN(Q2))),1),"abcdefghijklmnopqrstuvwxyz")))>0,SUMPRODUCT(--ISNUMBER(--MID(Q2,ROW($1:$999),1)))>0,SUMPRODUCT(--ISNUMBER(SEARCH(MID(R2,ROW(INDIRECT("R$2"&LEN(R2))),1),"abcdefghijklmnopqrstuvwxyz")))>0,SUMPRODUCT(--ISNUMBER(--MID(R2,ROW($1:$999),1)))>0)

Length :

=AND(LEN(Q2)<=16,LEN(R2)<=16)