19886363654345 has 8 divisors (see below), whose sum is σ = 24074819008776. Its totient is φ = 15768302507776.

The previous prime is 19886363654341. The next prime is 19886363654357. The reversal of 19886363654345 is 54345636368891.

It can be written as a sum of positive squares in 4 ways, for example, as 2623269361801 + 17263094292544 = 1619651^2 + 4154888^2 .

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 19886363654345 - 2² = 19886363654341 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (19886363654341) 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, 17598551342 + ... + 17598552471.

It is an arithmetic number, because the mean of its divisors is an integer number (3009352376097).

Almost surely, 2^{19886363654345} is an apocalyptic number.

It is an amenable number.

19886363654345 is a deficient number, since it is larger than the sum of its proper divisors (4188455354431).

19886363654345 is a wasteful number, since it uses less digits than its factorization.

19886363654345 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35197103931.

The product of its digits is 1343692800, while the sum is 71.

The spelling of 19886363654345 in words is "nineteen trillion, eight hundred eighty-six billion, three hundred sixty-three million, six hundred fifty-four thousand, three hundred forty-five".