19808593127309 has 8 divisors (see below), whose sum is σ = 22639779517440. Its totient is φ = 16977753580176.

The previous prime is 19808593127161. The next prime is 19808593127317. The reversal of 19808593127309 is 90372139580891.

It is a happy number.

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 19808593127309 - 2³² = 19804298160013 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 (19808593127359) 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, 86588354 + ... + 86816819.

It is an arithmetic number, because the mean of its divisors is an integer number (2829972439680).

Almost surely, 2^{19808593127309} is an apocalyptic number.

It is an amenable number.

19808593127309 is a deficient number, since it is larger than the sum of its proper divisors (2831186390131).

19808593127309 is a wasteful number, since it uses less digits than its factorization.

19808593127309 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 173421499.

The product of its (nonzero) digits is 29393280, while the sum is 65.

The spelling of 19808593127309 in words is "nineteen trillion, eight hundred eight billion, five hundred ninety-three million, one hundred twenty-seven thousand, three hundred nine".