21743271967 has 2 divisors, whose sum is σ = 21743271968. Its totient is φ = 21743271966.

The previous prime is 21743271923. The next prime is 21743272049. The reversal of 21743271967 is 76917234712.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 21743271967 - 2²⁷ = 21609054239 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 21743271967.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21743271917) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10871635983 + 10871635984.

It is an arithmetic number, because the mean of its divisors is an integer number (10871635984).

Almost surely, 2^21743271967 is an apocalyptic number.

21743271967 is a deficient number, since it is larger than the sum of its proper divisors (1).

21743271967 is an equidigital number, since it uses as much as digits as its factorization.

21743271967 is an evil number, because the sum of its binary digits is even.

The product of its digits is 889056, while the sum is 49.

The spelling of 21743271967 in words is "twenty-one billion, seven hundred forty-three million, two hundred seventy-one thousand, nine hundred sixty-seven".