19835324549 has 12 divisors (see below), whose sum is σ = 21750453888. Its totient is φ = 18066321600.

The previous prime is 19835324543. The next prime is 19835324627. The reversal of 19835324549 is 94542353891.

It is a happy number.

It is not a de Polignac number, because 19835324549 - 2⁴ = 19835324533 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 19835324549.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19835324543) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1098047 + ... + 1115964.

It is an arithmetic number, because the mean of its divisors is an integer number (1812537824).

Almost surely, 2^19835324549 is an apocalyptic number.

It is an amenable number.

19835324549 is a deficient number, since it is larger than the sum of its proper divisors (1915129339).

19835324549 is a wasteful number, since it uses less digits than its factorization.

19835324549 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2214076 (or 2214059 counting only the distinct ones).

The product of its digits is 4665600, while the sum is 53.

The spelling of 19835324549 in words is "nineteen billion, eight hundred thirty-five million, three hundred twenty-four thousand, five hundred forty-nine".