19679712469 has 4 divisors (see below), whose sum is σ = 19680102144. Its totient is φ = 19679322796.

The previous prime is 19679712439. The next prime is 19679712509. The reversal of 19679712469 is 96421797691.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 96421797691 = 149 ⋅647126159.

It is a cyclic number.

It is not a de Polignac number, because 19679712469 - 2⁹ = 19679711957 is a prime.

It is a super-2 number, since 2×19679712469² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19679712419) 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 in 3 ways as a sum of consecutive naturals, for example, 105397 + ... + 224650.

It is an arithmetic number, because the mean of its divisors is an integer number (4920025536).

Almost surely, 2^19679712469 is an apocalyptic number.

It is an amenable number.

19679712469 is a deficient number, since it is larger than the sum of its proper divisors (389675).

19679712469 is an equidigital number, since it uses as much as digits as its factorization.

19679712469 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 389674.

The product of its digits is 10287648, while the sum is 61.

The spelling of 19679712469 in words is "nineteen billion, six hundred seventy-nine million, seven hundred twelve thousand, four hundred sixty-nine".