19567941109 has 2 divisors, whose sum is σ = 19567941110. Its totient is φ = 19567941108.

The previous prime is 19567941083. The next prime is 19567941149. The reversal of 19567941109 is 90114976591.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 10129818609 + 9438122500 = 100647^2 + 97150^2 .

It is a cyclic number.

It is not a de Polignac number, because 19567941109 - 2⁵ = 19567941077 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (19567941149) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9783970554 + 9783970555.

It is an arithmetic number, because the mean of its divisors is an integer number (9783970555).

Almost surely, 2^19567941109 is an apocalyptic number.

It is an amenable number.

19567941109 is a deficient number, since it is larger than the sum of its proper divisors (1).

19567941109 is an equidigital number, since it uses as much as digits as its factorization.

19567941109 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 612360, while the sum is 52.

The spelling of 19567941109 in words is "nineteen billion, five hundred sixty-seven million, nine hundred forty-one thousand, one hundred nine".