19679883361 has 2 divisors, whose sum is σ = 19679883362. Its totient is φ = 19679883360.

The previous prime is 19679883359. The next prime is 19679883409. The reversal of 19679883361 is 16338897691.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 18345077136 + 1334806225 = 135444^2 + 36535^2 .

It is a cyclic number.

It is not a de Polignac number, because 19679883361 - 2¹ = 19679883359 is a prime.

Together with 19679883359, it forms a pair of twin primes.

It is a self number, because there is not a number n which added to its sum of digits gives 19679883361.

It is not a weakly prime, because it can be changed into another prime (19679883331) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9839941680 + 9839941681.

It is an arithmetic number, because the mean of its divisors is an integer number (9839941681).

Almost surely, 2^19679883361 is an apocalyptic number.

It is an amenable number.

19679883361 is a deficient number, since it is larger than the sum of its proper divisors (1).

19679883361 is an equidigital number, since it uses as much as digits as its factorization.

19679883361 is an evil number, because the sum of its binary digits is even.

The product of its digits is 11757312, while the sum is 61.

The spelling of 19679883361 in words is "nineteen billion, six hundred seventy-nine million, eight hundred eighty-three thousand, three hundred sixty-one".