19059564109 has 2 divisors, whose sum is σ = 19059564110. Its totient is φ = 19059564108.

The previous prime is 19059564103. The next prime is 19059564133. The reversal of 19059564109 is 90146595091.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 18802442884 + 257121225 = 137122^2 + 16035^2 .

It is a cyclic number.

It is not a de Polignac number, because 19059564109 - 2¹¹ = 19059562061 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (19059564103) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9529782054 + 9529782055.

It is an arithmetic number, because the mean of its divisors is an integer number (9529782055).

Almost surely, 2^19059564109 is an apocalyptic number.

It is an amenable number.

19059564109 is a deficient number, since it is larger than the sum of its proper divisors (1).

19059564109 is an equidigital number, since it uses as much as digits as its factorization.

19059564109 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 437400, while the sum is 49.

The spelling of 19059564109 in words is "nineteen billion, fifty-nine million, five hundred sixty-four thousand, one hundred nine".