19696871 has 2 divisors, whose sum is σ = 19696872. Its totient is φ = 19696870.

The previous prime is 19696849. The next prime is 19696877. The reversal of 19696871 is 17869691.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 19696871 - 2¹⁰ = 19695847 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (19696877) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9848435 + 9848436.

It is an arithmetic number, because the mean of its divisors is an integer number (9848436).

Almost surely, 2^19696871 is an apocalyptic number.

19696871 is a deficient number, since it is larger than the sum of its proper divisors (1).

19696871 is an equidigital number, since it uses as much as digits as its factorization.

19696871 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 163296, while the sum is 47.

The square root of 19696871 is about 4438.1157037644. The cubic root of 19696871 is about 270.0634098897.

The spelling of 19696871 in words is "nineteen million, six hundred ninety-six thousand, eight hundred seventy-one".