19491183359 has 6 divisors (see below), whose sum is σ = 20186470200. Its totient is φ = 18819072776.

The previous prime is 19491183347. The next prime is 19491183373. The reversal of 19491183359 is 95338119491.

It is not a de Polignac number, because 19491183359 - 2²⁴ = 19474406143 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 19491183359.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19491183379) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 11587259 + ... + 11588940.

It is an arithmetic number, because the mean of its divisors is an integer number (3364411700).

Almost surely, 2^19491183359 is an apocalyptic number.

19491183359 is a deficient number, since it is larger than the sum of its proper divisors (695286841).

19491183359 is an equidigital number, since it uses as much as digits as its factorization.

19491183359 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23176257 (or 23176228 counting only the distinct ones).

The product of its digits is 1049760, while the sum is 53.

The spelling of 19491183359 in words is "nineteen billion, four hundred ninety-one million, one hundred eighty-three thousand, three hundred fifty-nine".