19489794133 has 4 divisors (see below), whose sum is σ = 19490112928. Its totient is φ = 19489475340.

The previous prime is 19489794089. The next prime is 19489794157. The reversal of 19489794133 is 33149798491.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 19489794133 - 2²⁹ = 18952923221 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 (19489794173) 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, 35691 + ... + 200632.

It is an arithmetic number, because the mean of its divisors is an integer number (4872528232).

Almost surely, 2^19489794133 is an apocalyptic number.

It is an amenable number.

19489794133 is a deficient number, since it is larger than the sum of its proper divisors (318795).

19489794133 is an equidigital number, since it uses as much as digits as its factorization.

19489794133 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 318794.

The product of its digits is 5878656, while the sum is 58.

The spelling of 19489794133 in words is "nineteen billion, four hundred eighty-nine million, seven hundred ninety-four thousand, one hundred thirty-three".