Joshua’s defence of the IBF belt against Klitschko will also generate gate receipts worth about £7 million.
US television rights sold for almost £2.4 million, with Showtime and HBO sharing the rights.
German TV RTL has also paid about £4 million to broadcast the event in the country where Ukrainian Klitschko is a star.
More than £1 million is being pumped in by sponsors while merchandising could also break the £1 million barrier to deliver an eye-watering total well in excess of £40 million.
Anthony Joshua will pocket the sum of £15 million (N8.2 billion) for beating Wladimir Klitschko at weekend – the biggest purse earned by a British fighter on home soil.
Only Ricky Hatton has picked up more in one night as he earned in excess of £15 million for his clash with Floyd Mayweather Jnr in 2007 in Las Vegas.
The heavyweight clash at Wembley Stadium generated huge interest, which reach 1.5 million sales on pay-per-view, eclipsing the previous record of 1.15 million for Mayweather’s clash with Manny Pacquiao in 2015, which was 100,000 above the American’s fight with Hatton.