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"A survey by national council of Churches showed that in 1986 there were 20,736 females ministers, almost 9 percent of the nation's clergy, a number double that of 1977"

Is there any error in this sentence-specially with usage of that in the last part of the sentence

Also if the usage of "that" is correct then what is it funtioning as (relative pronoun, pronoun, conjunction etc)
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Adnan, this MAY be the answer: a number double that of 1977 = a number that is double the number of l977 = to avoid "number" two times, you replace it with the pronoun "that." In this sentence, the pronoun "points back" to the word "number." Therefore, it is called a demonstrative pronoun.
Comments  
"A survey by the national council of Churches showed that in 1986 there were 20,736 female[ s ] ministers, almost 9 percent of the nation's clergy, a number double that of 1977"

'that' is a relative pronoun used as object (antecedent 'the number') (please correct me if I'm wrong)
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I would capitalize the entire name of the organization: National Council of Churches.

The use of that is correct in the last sentence. I'm not sure I would call it an 'object'; isn't it more an apposiitive?
can't the word that stand for 1977 instead of "a number double"
adnan1947can't the word that stand for 1977 instead of "a number double"

It could be worded, "double that of 1977"{. But you need to keep the year in the sentence to be complete in the information.
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Hello Philip,

I am unclear about what you meant when you said "I would capitalize the entire name of the organization: National Council of Churches."

Regards,
Adnan
 anonymous's reply was promoted to an answer.