19832009 has 2 divisors, whose sum is σ = 19832010. Its totient is φ = 19832008.

The previous prime is 19831967. The next prime is 19832053. The reversal of 19832009 is 90023891.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 19758025 + 73984 = 4445^2 + 272^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-19832009 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (19832209) 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 as a sum of consecutive naturals, namely, 9916004 + 9916005.

It is an arithmetic number, because the mean of its divisors is an integer number (9916005).

Almost surely, 2^19832009 is an apocalyptic number.

It is an amenable number.

19832009 is a deficient number, since it is larger than the sum of its proper divisors (1).

19832009 is an equidigital number, since it uses as much as digits as its factorization.

19832009 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3888, while the sum is 32.

The square root of 19832009 is about 4453.3143836922. The cubic root of 19832009 is about 270.6796275822.

The spelling of 19832009 in words is "nineteen million, eight hundred thirty-two thousand, nine".