19979314867 has 2 divisors, whose sum is σ = 19979314868. Its totient is φ = 19979314866.

The previous prime is 19979314841. The next prime is 19979314909. The reversal of 19979314867 is 76841397991.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 19979314867 - 2²³ = 19970926259 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 19979314799 and 19979314808.

It is not a weakly prime, because it can be changed into another prime (19979311867) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9989657433 + 9989657434.

It is an arithmetic number, because the mean of its divisors is an integer number (9989657434).

Almost surely, 2^19979314867 is an apocalyptic number.

19979314867 is a deficient number, since it is larger than the sum of its proper divisors (1).

19979314867 is an equidigital number, since it uses as much as digits as its factorization.

19979314867 is an evil number, because the sum of its binary digits is even.

The product of its digits is 20575296, while the sum is 64.

The spelling of 19979314867 in words is "nineteen billion, nine hundred seventy-nine million, three hundred fourteen thousand, eight hundred sixty-seven".