You can eliminate the spaces with a field coded as:
{QUOTE{SET ID {MERGEFIELD SSN}}{SET EXP1{=-{=-{ID}-ID}/2}}{SET EXP2{=-({ID}*(-1)-{ID})/2}}{SET EXP3{=({ID}*(-1)-ID)/2}}{=EXP1*1000000+EXP2*10000+EXP3 \#000000000}}
However, whether you'll be able to use that depends on how the other software to which you refer updates the document.

__________________
Cheers,
Paul Edstein
[Fmr MS MVP - Word]