19808385194419 has 4 divisors (see below), whose sum is σ = 19808410646896. Its totient is φ = 19808359741944.

The previous prime is 19808385194417. The next prime is 19808385194431. The reversal of 19808385194419 is 91449158380891.

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

It is a cyclic number.

It is not a de Polignac number, because 19808385194419 - 2¹ = 19808385194417 is a prime.

It is a super-2 number, since 2×19808385194419² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (19808385194417) 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, 11520804 + ... + 13128049.

It is an arithmetic number, because the mean of its divisors is an integer number (4952102661724).

Almost surely, 2^{19808385194419} is an apocalyptic number.

19808385194419 is a deficient number, since it is larger than the sum of its proper divisors (25452477).

19808385194419 is an equidigital number, since it uses as much as digits as its factorization.

19808385194419 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25452476.

The product of its (nonzero) digits is 89579520, while the sum is 70.

The spelling of 19808385194419 in words is "nineteen trillion, eight hundred eight billion, three hundred eighty-five million, one hundred ninety-four thousand, four hundred nineteen".