 
Copyright © 2002 by Rainer Typke
No zeros occur in this puzzle.
Across: A: A palindrome.
C: A palindrome.
E: Divide this palindrome by C across, and the result equals four times the digit product of P down.
G: 4 times N down.
J: A prime number.
L: J down + K down
M: The third power of A down.
N: If this palindrome is divided by A across, the result is another palindrome.
P: P across divided by T across equals the digit sum of P across.
Q: A prime number.
S: S across divided by O down is a prime number.
T: A prime number.
U: This prime number is a divisor of J down.
Down: A: A cubic number.
B: C down minus the reverse of G across
C: A prime number.
D: The reverse of the prime number D down divided by the digit sum of C across is a square number.
F: The third power of A across.
H: H down divided by D down equals N across divided by A across.
I: I across divided by Q across equals half the digit product of P down.
J: A palindrome.
K: K down divided by J across equals the digit sum of J down.
N: A prime number.
O: A prime number.
P: The digit product of A across multiplied with the digit product of N across.
R: This palindrome equals C across plus T across.
