Mark Zuckerberg says he can change a diaper in 20 seconds

He's only been a father for three months - but Mark Zuckerberg is already flaunting his parenting feats.

The billionaire dad, who was in Berlin with his wife Priscilla Chan to receive an award from German publishing house Axel Springer, said he could change a diaper in no more than 20 seconds.

Zuckerberg took two months of parental leave after his daughter's birth in November last year. Just a few weeks later, he posted a photo of himself changing newborn Max's diaper on his Facebook page.

'I'm a pretty competitive guy,' Zuckerberg told Axel Springer CEO Mathias Dopfner. 'So I timed myself to make sure I could get better and better over time.

got it down to 20 seconds. I think that's pretty good, right?'

Dopfner turned to Zuckerberg's wife for confirmation.

'Priscilla, is it true, what he's saying?' he asked.

'I think it's true when there's been no accident,' she said from the audience.

Chan and Zuckerberg announced Max's birth in a long Facebook post in December last year.

In the post, they pledged to donate 99 percent of their Facebook shares, worth about $45 billion at the time, to charity, to fight illnesses such as heart disease, cancer, stroke, neurodegenerative and infectious diseases