probably an account number? Corn referring to money.
https://www.mirror.co.uk/3am/celebrity-news/inside-victoria-beckhams-5k-detox-16156520
Posh Beckham detox on "Moon Water"
"So I am here at Lanserhof in Germany, and they've just given me this water, which is a special water. It is collected locally, here in Munich, but only on a full moon.
"Apparently this is very healthy water, an incredible water and great for the skin. Where am I going to get this when I leave Germany?," she told her fans.