19495134679 has 2 divisors, whose sum is σ = 19495134680. Its totient is φ = 19495134678.

The previous prime is 19495134671. The next prime is 19495134683. The reversal of 19495134679 is 97643159491.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 19495134679 - 2³ = 19495134671 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (19495134671) 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, 9747567339 + 9747567340.

It is an arithmetic number, because the mean of its divisors is an integer number (9747567340).

Almost surely, 2^19495134679 is an apocalyptic number.

19495134679 is a deficient number, since it is larger than the sum of its proper divisors (1).

19495134679 is an equidigital number, since it uses as much as digits as its factorization.

19495134679 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 7348320, while the sum is 58.

The spelling of 19495134679 in words is "nineteen billion, four hundred ninety-five million, one hundred thirty-four thousand, six hundred seventy-nine".