19423718797 has 8 divisors (see below), whose sum is σ = 22334724416. Its totient is φ = 16546760352.

The previous prime is 19423718789. The next prime is 19423718827. The reversal of 19423718797 is 79781732491.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 19423718797 - 2³ = 19423718789 is a prime.

It is a super-2 number, since 2×19423718797² (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 (19423718737) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8510568 + ... + 8512849.

It is an arithmetic number, because the mean of its divisors is an integer number (2791840552).

Almost surely, 2^19423718797 is an apocalyptic number.

It is an amenable number.

19423718797 is a deficient number, since it is larger than the sum of its proper divisors (2911005619).

19423718797 is a wasteful number, since it uses less digits than its factorization.

19423718797 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17023587.

The product of its digits is 5334336, while the sum is 58.

The spelling of 19423718797 in words is "nineteen billion, four hundred twenty-three million, seven hundred eighteen thousand, seven hundred ninety-seven".