19665043695193 has 96 divisors (see below), whose sum is σ = 23683912704000. Its totient is φ = 16242650012160.

The previous prime is 19665043695163. The next prime is 19665043695221. The reversal of 19665043695193 is 39159634056691.

It is not a de Polignac number, because 19665043695193 - 2⁴¹ = 17466020439641 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (19665043695163) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 6513759238 + ... + 6513762256.

It is an arithmetic number, because the mean of its divisors is an integer number (246707424000).

Almost surely, 2^{19665043695193} is an apocalyptic number.

19665043695193 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

It is an amenable number.

19665043695193 is a deficient number, since it is larger than the sum of its proper divisors (4018869008807).

19665043695193 is a wasteful number, since it uses less digits than its factorization.

19665043695193 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4167 (or 4154 counting only the distinct ones).

The product of its (nonzero) digits is 141717600, while the sum is 67.

The spelling of 19665043695193 in words is "nineteen trillion, six hundred sixty-five billion, forty-three million, six hundred ninety-five thousand, one hundred ninety-three".