Fatto generale: 16 is the number of teams that qualified for the finals of the FIFA World Cup from 1934 through 1978 (although for various reasons, only 15 competed in the 1938 and 1950 finals).
Fatto matematico: 16 is the first number to be the aliquot sum of a lesser number; 12, it is also the aliquot sum of the greater number; the discrete semiprime, 26.
Trivia: 16 is the number of personality types in the Myers-Briggs classification system.
Data storica: January 16th is the day in 1920 that the League of Nations holds its first council meeting in Paris, France.