21000076965712 has 60 divisors (see below), whose sum is σ = 44059695220380. Its totient is φ = 9692019477504.

The previous prime is 21000076965691. The next prime is 21000076965733. The reversal of 21000076965712 is 21756967000012.

It is an interprime number because it is at equal distance from previous prime (21000076965691) and next prime (21000076965733).

It can be written as a sum of positive squares in 6 ways, for example, as 1991383834896 + 19008693130816 = 1411164^2 + 4359896^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 93275614 + ... + 93500482.

It is an arithmetic number, because the mean of its divisors is an integer number (734328253673).

Almost surely, 2^{21000076965712} is an apocalyptic number.

It is an amenable number.

21000076965712 is an abundant number, since it is smaller than the sum of its proper divisors (23059618254668).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21000076965712 is a wasteful number, since it uses less digits than its factorization.

21000076965712 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 259440 (or 259421 counting only the distinct ones).

The product of its (nonzero) digits is 317520, while the sum is 46.

The spelling of 21000076965712 in words is "twenty-one trillion, seventy-six million, nine hundred sixty-five thousand, seven hundred twelve".