No zeros occur in this puzzle.
A: the reverse of a prime number.
C: a prime number.
F: F across divided by the digit sum of L across is a square number.
G: this prime number equals E down divided by M across.
H: H across is a multiple of both C across and C down.
J: G across multiplied with C down.
L: a cubic number.
M: a prime number.
B: a multiple of L across.
C: a palindrome.
D: A across multiplied with M across.
E: a palindrome.
F: a multiple of L across. All digits of F down are even.
I: C across multiplied with the digit sum of I down.
K: the reverse of K down is a square number.