Big B, who shared the news on Twitter, wrote:
T 2120 - In all the excitement of retweeting the 19 million on Twitter .. forgot the 34 yrs of 'Satte Pe Satta" pic.twitter.com/Q22WgyvCJw? Amitabh Bachchan (@SrBachchan) January 21, 2016
Big B, 73, beat his contemporaries including Shah Rukh Khan (17.5 million), Aamir Khan (16,2 million), Salman Khan (15.8 million) and Priyanka Chopra (12.5 million) to achieve the new milestone.
An action-comedy, Satte Pe Satta was an adaptation of the 1954 Hollywood film Seven Brides for Seven Brothers. Besides starring Mr Bachchan in a prominent role, the Raj N Sippy-directed film also featured Hema Malini, Amjad Khan and Sachin.
Big B, who joined Twitter in 2010, constantly engages with his fans on the social networking site.
The actor, who has 47, 500 tweets to his credit so far, is followed by stars like Mukesh Bhatt, Sridevi, Dilip Kumar, Madhuri Dixit.