19509119348 has 12 divisors (see below), whose sum is σ = 34338306660. Its totient is φ = 9698174592.

The previous prime is 19509119341. The next prime is 19509119381. The reversal of 19509119348 is 84391190591.

It can be written as a sum of positive squares in 2 ways, for example, as 16517904484 + 2991214864 = 128522^2 + 54692^2 .

It is a junction number, because it is equal to n+sod(n) for n = 19509119296 and 19509119305.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19509119341) 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, 14095493 + ... + 14096876.

It is an arithmetic number, because the mean of its divisors is an integer number (2861525555).

Almost surely, 2^19509119348 is an apocalyptic number.

It is an amenable number.

19509119348 is a deficient number, since it is larger than the sum of its proper divisors (14829187312).

19509119348 is a wasteful number, since it uses less digits than its factorization.

19509119348 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28192546 (or 28192544 counting only the distinct ones).

The product of its (nonzero) digits is 349920, while the sum is 50.

The spelling of 19509119348 in words is "nineteen billion, five hundred nine million, one hundred nineteen thousand, three hundred forty-eight".