23 (twenty-three) is the natural number following 22 and preceding 24.
Twenty-three is the ninth prime number, the smallest odd prime that is not a twin prime. Twenty-three is also the fifth factorial prime, the third Woodall prime. It is an Eisenstein prime with no imaginary part and real part of the form 3n − 1.
Twenty-three is the sum of three other, consecutive, prime numbers; 5, 7 and 11. It is the first prime number showing this characteristic.
The fifth Sophie Germain prime and the fourth safe prime, 23 is the next to last member of the first Cunningham chain of the first kind to have five terms (2, 5, 11, 23, 47). Since 14! + 1 is a multiple of 23 but 23 is not one more than a multiple 14, 23 is a Pillai prime. 23 is the smallest odd prime to be a highly cototient number, as the solution to x − φ(x) for the integers 95, 119, 143, 529.
Twenty-three is the aliquot sum of two integers; the discrete semiprimes 57 and 85 and is the base of the 23-aliquot tree.
23 is the first prime P for which unique factorization of cyclotomic integers based on the Pth root of unity breaks down.
Maharana Pratap or Pratap Singh (May 24, 1540 – January 19, 1597) was a Hindu ruler of Mewar, a small region in north-western India in the present day state of Rajasthan. In popular Indian culture, Pratap is considered to exemplify the qualities like bravery and chivalry to which Rajputs aspire, especially in context of his opposition to the Akbar. The struggle between Rajput confederacy led by Pratap Singh, and the Mughal Empire under Akbar, has often been characterised in popular Hindutva culture as a struggle between Hindus and the 'invading' Muslims, much on the same lines as the struggle between Shivaji and Aurangzeb a little less than a century later. However, notably, unlike Shivaji, Pratap Singh has also symbolised the pride and prestige of upper caste Hindus in northern India, because of the obvious differences between their lineages - but this allegation have little truth because much of Pratap's own soldiery were recruited from among tribal people like Bhils and backward castes like Lohars, while his own upper caste contemporaries like Man Singh of Amber supported Mughals.
Tarak Mehta (born 1930) is an Indian columnist, humorist, writer and playwright. best known for the column Duniya Na Undha Chasma in Gujarati Language. He has translated and adapted several comedies into Gujarati, and has been well-known figure in the Gujarati theatre.
The humorous weekly column first appeared in Chitralekha in March 1971 and ever since has been looking at contemporary issues from a different perspective. He has published 80 books, over the years, three books are based on the columns he wrote in Gujarati newspaper, Divya Bhaskar while rest were compiled from the stories in Taarak Mehta Ka Ooltah Chashmah.
In 2008 SAB TV, a popular entertainment channel in India, started a show Taarak Mehta Ka Ooltah Chashmah that is based on his column., and soon it became the flagship show of the channel.
He stays in Ahmedabad, Gujarat, where he moved in year 2000, with second wife, Indu of over 30 years, His first wife, Ila who later married Manohar Doshi, (died 2006), also stayed in the same apartment building. He has daughter from his first marriage, Ishani, who stays in US, and has two children, Kushan and Shaili.