19022009 has 2 divisors, whose sum is σ = 19022010. Its totient is φ = 19022008.

The previous prime is 19021993. The next prime is 19022041. The reversal of 19022009 is 90022091.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 16687225 + 2334784 = 4085^2 + 1528^2 .

It is a cyclic number.

It is not a de Polignac number, because 19022009 - 2⁴ = 19021993 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (19022209) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9511004 + 9511005.

It is an arithmetic number, because the mean of its divisors is an integer number (9511005).

Almost surely, 2^19022009 is an apocalyptic number.

It is an amenable number.

19022009 is a deficient number, since it is larger than the sum of its proper divisors (1).

19022009 is an equidigital number, since it uses as much as digits as its factorization.

19022009 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 324, while the sum is 23.

The square root of 19022009 is about 4361.4228183014. The cubic root of 19022009 is about 266.9431581878.

The spelling of 19022009 in words is "nineteen million, twenty-two thousand, nine".