19934582771 has 2 divisors, whose sum is σ = 19934582772. Its totient is φ = 19934582770.

The previous prime is 19934582749. The next prime is 19934582783. The reversal of 19934582771 is 17728543991.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-19934582771 is a prime.

It is not a weakly prime, because it can be changed into another prime (19934582791) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9967291385 + 9967291386.

It is an arithmetic number, because the mean of its divisors is an integer number (9967291386).

Almost surely, 2^19934582771 is an apocalyptic number.

19934582771 is a deficient number, since it is larger than the sum of its proper divisors (1).

19934582771 is an equidigital number, since it uses as much as digits as its factorization.

19934582771 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3810240, while the sum is 56.

The spelling of 19934582771 in words is "nineteen billion, nine hundred thirty-four million, five hundred eighty-two thousand, seven hundred seventy-one".