19100215009 has 2 divisors, whose sum is σ = 19100215010. Its totient is φ = 19100215008.

The previous prime is 19100214989. The next prime is 19100215027. The reversal of 19100215009 is 90051200191.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 16926790609 + 2173424400 = 130103^2 + 46620^2 .

It is a cyclic number.

It is not a de Polignac number, because 19100215009 - 2¹⁹ = 19099690721 is a prime.

It is not a weakly prime, because it can be changed into another prime (19100215109) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9550107504 + 9550107505.

It is an arithmetic number, because the mean of its divisors is an integer number (9550107505).

Almost surely, 2^19100215009 is an apocalyptic number.

It is an amenable number.

19100215009 is a deficient number, since it is larger than the sum of its proper divisors (1).

19100215009 is an equidigital number, since it uses as much as digits as its factorization.

19100215009 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 810, while the sum is 28.

The spelling of 19100215009 in words is "nineteen billion, one hundred million, two hundred fifteen thousand, nine".