19423647969 has 16 divisors (see below), whose sum is σ = 28266242304. Its totient is φ = 11766214800.

The previous prime is 19423647917. The next prime is 19423647977. The reversal of 19423647969 is 96974632491.

It is not a de Polignac number, because 19423647969 - 2²⁰ = 19422599393 is a prime.

It is a super-2 number, since 2×19423647969² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (19423637969) 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 15 ways as a sum of consecutive naturals, for example, 72547 + ... + 210024.

It is an arithmetic number, because the mean of its divisors is an integer number (1766640144).

Almost surely, 2^19423647969 is an apocalyptic number.

It is an amenable number.

19423647969 is a deficient number, since it is larger than the sum of its proper divisors (8842594335).

19423647969 is a wasteful number, since it uses less digits than its factorization.

19423647969 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 284668.

The product of its digits is 17635968, while the sum is 60.

The spelling of 19423647969 in words is "nineteen billion, four hundred twenty-three million, six hundred forty-seven thousand, nine hundred sixty-nine".