19660823085841 has 16 divisors (see below), whose sum is σ = 22689450265600. Its totient is φ = 16687983145680.

The previous prime is 19660823085821. The next prime is 19660823085853. The reversal of 19660823085841 is 14858032806691.

It is not a de Polignac number, because 19660823085841 - 2³⁹ = 19111067271953 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 19660823085841.

It is not an unprimeable number, because it can be changed into a prime (19660823085821) 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, 33151611 + ... + 33739456.

It is an arithmetic number, because the mean of its divisors is an integer number (1418090641600).

Almost surely, 2^{19660823085841} is an apocalyptic number.

It is an amenable number.

19660823085841 is a deficient number, since it is larger than the sum of its proper divisors (3028627179759).

19660823085841 is a wasteful number, since it uses less digits than its factorization.

19660823085841 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 66891484.

The product of its (nonzero) digits is 19906560, while the sum is 61.

The spelling of 19660823085841 in words is "nineteen trillion, six hundred sixty billion, eight hundred twenty-three million, eighty-five thousand, eight hundred forty-one".