19042248391 has 4 divisors (see below), whose sum is σ = 19042756992. Its totient is φ = 19041739792.

The previous prime is 19042248361. The next prime is 19042248409. The reversal of 19042248391 is 19384224091.

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 19042248391 - 2²⁹ = 18505377479 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 (19042248331) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 193255 + ... + 274648.

It is an arithmetic number, because the mean of its divisors is an integer number (4760689248).

Almost surely, 2^19042248391 is an apocalyptic number.

19042248391 is a deficient number, since it is larger than the sum of its proper divisors (508601).

19042248391 is an equidigital number, since it uses as much as digits as its factorization.

19042248391 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 508600.

The product of its (nonzero) digits is 124416, while the sum is 43.

The spelling of 19042248391 in words is "nineteen billion, forty-two million, two hundred forty-eight thousand, three hundred ninety-one".