19863832816997 has 16 divisors (see below), whose sum is σ = 22650403556592. Its totient is φ = 17257082711040.

The previous prime is 19863832816981. The next prime is 19863832817011. The reversal of 19863832816997 is 79961823836891.

It is a Cunningham number, because it is equal to 4456886²+1.

It can be written as a sum of positive squares in 8 ways, for example, as 179357332036 + 19684475484961 = 423506^2 + 4436719^2 .

It is a cyclic number.

It is not a de Polignac number, because 19863832816997 - 2⁴ = 19863832816981 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19863832816937) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 22893347 + ... + 23745167.

It is an arithmetic number, because the mean of its divisors is an integer number (1415650222287).

Almost surely, 2^{19863832816997} is an apocalyptic number.

19863832816997 is a gapful number since it is divisible by the number (17) formed by its first and last digit.

It is an amenable number.

19863832816997 is a deficient number, since it is larger than the sum of its proper divisors (2786570739595).

19863832816997 is a wasteful number, since it uses less digits than its factorization.

19863832816997 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 957368.

The product of its digits is 1693052928, while the sum is 80.

The spelling of 19863832816997 in words is "nineteen trillion, eight hundred sixty-three billion, eight hundred thirty-two million, eight hundred sixteen thousand, nine hundred ninety-seven".