19431315968831 has 6 divisors (see below), whose sum is σ = 21041010783000. Its totient is φ = 17936599355688.

The previous prime is 19431315968809. The next prime is 19431315968837. The reversal of 19431315968831 is 13886951313491.

It is a de Polignac number, because none of the positive numbers 2^k-19431315968831 is a prime.

It is a super-2 number, since 2×19431315968831² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19431315968837) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 57489100331 + ... + 57489100668.

It is an arithmetic number, because the mean of its divisors is an integer number (3506835130500).

Almost surely, 2^{19431315968831} is an apocalyptic number.

19431315968831 is a deficient number, since it is larger than the sum of its proper divisors (1609694814169).

19431315968831 is a wasteful number, since it uses less digits than its factorization.

19431315968831 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 114978201025 (or 114978201012 counting only the distinct ones).

The product of its digits is 16796160, while the sum is 62.

The spelling of 19431315968831 in words is "nineteen trillion, four hundred thirty-one billion, three hundred fifteen million, nine hundred sixty-eight thousand, eight hundred thirty-one".