19835109 has 24 divisors (see below), whose sum is σ = 32872320. Its totient is φ = 11289888.

The previous prime is 19835099. The next prime is 19835111. The reversal of 19835109 is 90153891.

It is a happy number.

It is not a de Polignac number, because 19835109 - 2⁵ = 19835077 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19835129) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 22179 + ... + 23055.

It is an arithmetic number, because the mean of its divisors is an integer number (1369680).

Almost surely, 2^19835109 is an apocalyptic number.

It is an amenable number.

19835109 is a deficient number, since it is larger than the sum of its proper divisors (13037211).

19835109 is a wasteful number, since it uses less digits than its factorization.

19835109 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1249 (or 1246 counting only the distinct ones).

The product of its (nonzero) digits is 9720, while the sum is 36.

The square root of 19835109 is about 4453.6624254651. The cubic root of 19835109 is about 270.6937304252.

The spelling of 19835109 in words is "nineteen million, eight hundred thirty-five thousand, one hundred nine".