19697263867 has 4 divisors (see below), whose sum is σ = 19797250176. Its totient is φ = 19597277560.

The previous prime is 19697263847. The next prime is 19697263891. The reversal of 19697263867 is 76836279691.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 19697263867 - 2³¹ = 17549780219 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 19697263799 and 19697263808.

It is not an unprimeable number, because it can be changed into a prime (19697263847) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 49992859 + ... + 49993252.

It is an arithmetic number, because the mean of its divisors is an integer number (4949312544).

Almost surely, 2^19697263867 is an apocalyptic number.

19697263867 is a deficient number, since it is larger than the sum of its proper divisors (99986309).

19697263867 is an equidigital number, since it uses as much as digits as its factorization.

19697263867 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 99986308.

The product of its digits is 41150592, while the sum is 64.

The spelling of 19697263867 in words is "nineteen billion, six hundred ninety-seven million, two hundred sixty-three thousand, eight hundred sixty-seven".