Amazon had a very merry Christmas thanks to its Prime program topping the 20 million-member mark in what it calling the best holiday season in the company’s history. The 20 million people who are now signed up to the $79 per year program was just part of the good news. Amazon says that it shipped more than 36.8 million items that were ordered on Cyber Monday (News - Alert) alone. That doesn’t even include the massive number of items that were ordered and shipped leading up to Christmas Eve.

Despite the celebration, the company did not disclose financial information, so the online retail world won’t really know just how much the giant made until its fourth quarter report comes out. The Amazon Prime statement is significant because the Jeff Bezos owned company doesn’t usually divulge their subscription numbers very often.  There were estimates that the company had reach around 16 million Prime subscribers by the end of September but Amazon had not been willing to release official numbers.

“Amazon Prime membership continues to grow, and we now have tens of millions of members worldwide. They benefit from all-you-can-eat free two-day shipping on millions of eligible items and our members have a voracious appetite,” said Bezos in Amazon’s post-Christmas news release. “We are extremely grateful to our customers around the world and wish everyone the very best for the coming year.”

While Prime is a program that the company has worked hard to grow, it should be mentioned that the retail goliath is hardly standing pat and putting all its eggs in one basket. Amazon Pantry is just one new service that the retailer is said to be rolling out in 2014 that could make the company an even bigger headache for its competitors.

The massive number of Prime memberships is generally good news, though a record number of Prime orders being placed on Amazon’s biggest shopping days likely helped lead to quite a few packages being delivered late after FedEX and UPS couldn’t handle the load.