19830009 has 16 divisors (see below), whose sum is σ = 27194112. Its totient is φ = 12846288.

The previous prime is 19829993. The next prime is 19830023. The reversal of 19830009 is 90003891.

It is a happy number.

It is not a de Polignac number, because 19830009 - 2⁴ = 19829993 is a prime.

It is not an unprimeable number, because it can be changed into a prime (19830079) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 44542 + ... + 44984.

It is an arithmetic number, because the mean of its divisors is an integer number (1699632).

Almost surely, 2^19830009 is an apocalyptic number.

It is an amenable number.

19830009 is a deficient number, since it is larger than the sum of its proper divisors (7364103).

19830009 is a wasteful number, since it uses less digits than its factorization.

19830009 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 836.

The product of its (nonzero) digits is 1944, while the sum is 30.

The square root of 19830009 is about 4453.0898261769. The cubic root of 19830009 is about 270.6705281939.

The spelling of 19830009 in words is "nineteen million, eight hundred thirty thousand, nine".