19980091663183 has 4 divisors (see below), whose sum is σ = 21155391172800. Its totient is φ = 18804792153568.

The previous prime is 19980091663163. The next prime is 19980091663211. The reversal of 19980091663183 is 38136619008991.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-19980091663183 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 (19980091663163) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 587649754783 + ... + 587649754816.

It is an arithmetic number, because the mean of its divisors is an integer number (5288847793200).

Almost surely, 2^{19980091663183} is an apocalyptic number.

19980091663183 is a deficient number, since it is larger than the sum of its proper divisors (1175299509617).

19980091663183 is a wasteful number, since it uses less digits than its factorization.

19980091663183 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1175299509616.

The product of its (nonzero) digits is 15116544, while the sum is 64.

The spelling of 19980091663183 in words is "nineteen trillion, nine hundred eighty billion, ninety-one million, six hundred sixty-three thousand, one hundred eighty-three".