PRUDENTIAL UNIT TRUSTS TAX EXEMPT SERIES 20, 497J, 1994-07-05

PRUDENTIAL UNIT TRUSTS TAX EXEMPT SERIES 20
497J, 1994-07-05

Previous: DEFINED ASSET FUNDS MUNICIPAL INVT TR FD INSURED SERIES 177, 497, 1994-07-05

Next: EQUITABLE REAL ESTATE SHOPPING CENTERS LP, 8-K, 1994-07-05



<PAGE>
                              Rule 497(j)
                              Registration No. 33-10873                         
                              Registration No. 33-9471       
        


Pursuant to Rule 497(j) promulgated under the Securities Act of
1933, the Registrant, Prudential Unit Trusts, Tax-Exempt Series 20
and Insured Tax-Exempt Series 24 hereby certifies as follows:

1)   the form of prospectus that would have been filed under
paragraph (b) of Rule 497 does not differ from that contained in
the most recent amendment to the registration statement, and

2)   the text of the said amendment to the registration statement
has been filed electronically.

                         PRUDENTIAL UNIT TRUSTS, 
                         Tax-Exempt Series 20
                         Insured Tax-Exempt Series 24 


                         By: Prudential Securities Incorporated
                                  (Depositor)


                             Richard R. Hoffmann
                             Richard R. Hoffmann
                             Authorized Signatory