19868322386891 has 8 divisors (see below), whose sum is σ = 21682630120944. Its totient is φ = 18055364087520.

The previous prime is 19868322386881. The next prime is 19868322386893.

19868322386891 is nontrivially palindromic in base 10.

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 19868322386891 - 2¹⁸ = 19868322124747 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (19868322386893) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 337327880 + ... + 337386773.

It is an arithmetic number, because the mean of its divisors is an integer number (2710328765118).

Almost surely, 2^{19868322386891} is an apocalyptic number.

19868322386891 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

19868322386891 is a deficient number, since it is larger than the sum of its proper divisors (1814307734053).

19868322386891 is a wasteful number, since it uses less digits than its factorization.

19868322386891 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 674717341.

The product of its digits is 429981696, while the sum is 74.

The spelling of 19868322386891 in words is "nineteen trillion, eight hundred sixty-eight billion, three hundred twenty-two million, three hundred eighty-six thousand, eight hundred ninety-one".