This is the 5072nd most frequent Russian word.
многочисленными
"Numerous" or "many."
The word 'многочисленными' is used as an instrumental plural adjective to describe the noun 'фактами,' indicating that the facts are numerous.
Ученый делится многочисленными фактами о природе.
The scientist shares numerous facts about nature.
Here, 'многочисленными' qualifies 'художниками' in the instrumental plural form, emphasizing the large number of artists involved.
На выставке представлены картины, созданные многочисленными художниками.
At the exhibition, there are paintings created by numerous artists.
In this sentence, 'многочисленными' is used with 'меценатами' and 'спонсорами' in the instrumental plural, underlining the multitude of supporters for the project.