21727066682 has 24 divisors (see below), whose sum is σ = 34635213468. Its totient is φ = 10186856960.

The previous prime is 21727066667. The next prime is 21727066687. The reversal of 21727066682 is 28666072712.

It can be written as a sum of positive squares in 6 ways, for example, as 16928872321 + 4798194361 = 130111^2 + 69269^2 .

It is not an unprimeable number, because it can be changed into a prime (21727066687) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2680628 + ... + 2688720.

Almost surely, 2^21727066682 is an apocalyptic number.

21727066682 is a deficient number, since it is larger than the sum of its proper divisors (12908146786).

21727066682 is an equidigital number, since it uses as much as digits as its factorization.

21727066682 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8674 (or 8393 counting only the distinct ones).

The product of its (nonzero) digits is 677376, while the sum is 47.

The spelling of 21727066682 in words is "twenty-one billion, seven hundred twenty-seven million, sixty-six thousand, six hundred eighty-two".