19834009 has 6 divisors (see below), whose sum is σ = 21477246. Its totient is φ = 18308160.

The previous prime is 19834007. The next prime is 19834039. The reversal of 19834009 is 90043891.

It can be written as a sum of positive squares in 3 ways, for example, as 120409 + 19713600 = 347^2 + 4440^2 .

It is not a de Polignac number, because 19834009 - 2¹ = 19834007 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (19834007) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 58512 + ... + 58849.

It is an arithmetic number, because the mean of its divisors is an integer number (3579541).

Almost surely, 2^19834009 is an apocalyptic number.

It is an amenable number.

19834009 is a deficient number, since it is larger than the sum of its proper divisors (1643237).

19834009 is a wasteful number, since it uses less digits than its factorization.

19834009 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 117387 (or 117374 counting only the distinct ones).

The product of its (nonzero) digits is 7776, while the sum is 34.

The square root of 19834009 is about 4453.5389298849. The cubic root of 19834009 is about 270.6887263588.

The spelling of 19834009 in words is "nineteen million, eight hundred thirty-four thousand, nine".