The world's 10 most eligible billionaire bachelors

They are straight out of the Mills & Boons novel. Some of them fly their own helicopter, some stay in a castle, and yes, they have all the money in the world.

Here are the 10 most eligible bachelors in the world.

Source: Forbes

…

Drew Houston

Net worth: $1.2 billion

Age: 30

Andrew W. "Drew" Houston is an American internet entrepreneur who is best known as Dropbox's founder and CEO.

…

Albert von Thurn und Taxis

Net worth: $1.6 billion

Age: 30

He is a German aristocrat - the 12th Prince of Thurn and Taxis.

…

Eduardo Saverin

Net worth: $4.1 billion

Age: 31

Eduardo Luiz Saverin is a Brazilian internet entrepreneur and investor. Saverin is one of five co-founders of Facebook, along with Mark Zuckerberg, Dustin Moskovitz, Chris Hughes, and Andrew McCollum.

…

Robert Pera

Net worth: $2.7 billion

Age: 35

Robert J. Pera is the founder and CEO of Ubiquiti Networks. He has also worked with as a wireless engineer with Apple.

Pera is also the principal owner of the Memphis Grizzlies of the National Basketball Association.

…

Yoshikazu Tanaka

Net worth: $1.6 billion

Age: 37

Yoshikazu Tanaka is a Japanese entrepreneur who is a developer of Social Networking Service GREE.

…

Jack Dorsey

Net worth: $2.2 billion

Age: 37

Jack Dorsey is an American web developer and businessman widely known as a co-founder and co-creator of Twitter, and as the founder and CEO of Square, a mobile payments company.

…

Jan Koum

Net worth: $6.8 billion

Age: 38

Jan Koum is CEO and co-founder of WhatsApp messenging app, which was acquired by Facebook for $19 billion.

…

Jonathan Oringer

Net worth: $1.35 billion

Age: 39

Jon Oringer is an American entrepreneur and the founder of the popular microstock photography site Shutterstock. He is currently Shutterstock's CEO.

…

Alejandro Santo Domingo Davila

Net worth: $11.1 billion

Age: 37

Alejandro inherited wealth from his father - the Colombian beer king Julio Mario Santo Domingo Pumarejo. Among various investments, his family owns 15 per cent in SABMiller. He is also the managing director of the New York-based Quadrant Capital Advisors, Inc.

…

Nicolas Berggruen

Net worth: $2 billion

Age: 52

Nicolas Berggruen is the founder and president of Berggruen Holdings, a private investment company, and the Berggruen Institute on Governance, a think tank that works on addressing governance issues. He is also a co-founder of The WorldPost.