16720743271 has 2 divisors, whose sum is σ = 16720743272. Its totient is φ = 16720743270.

The previous prime is 16720743269. The next prime is 16720743283. The reversal of 16720743271 is 17234702761.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 16720743271 - 2¹ = 16720743269 is a prime.

Together with 16720743269, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (16720743671) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8360371635 + 8360371636.

It is an arithmetic number, because the mean of its divisors is an integer number (8360371636).

Almost surely, 2^16720743271 is an apocalyptic number.

16720743271 is a deficient number, since it is larger than the sum of its proper divisors (1).

16720743271 is an equidigital number, since it uses as much as digits as its factorization.

16720743271 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 98784, while the sum is 40.

The spelling of 16720743271 in words is "sixteen billion, seven hundred twenty million, seven hundred forty-three thousand, two hundred seventy-one".