19506347869 has 2 divisors, whose sum is σ = 19506347870. Its totient is φ = 19506347868.

The previous prime is 19506347843. The next prime is 19506347897. The reversal of 19506347869 is 96874360591.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 17237064100 + 2269283769 = 131290^2 + 47637^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-19506347869 is a prime.

It is a super-2 number, since 2×19506347869² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (19506387869) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9753173934 + 9753173935.

It is an arithmetic number, because the mean of its divisors is an integer number (9753173935).

Almost surely, 2^19506347869 is an apocalyptic number.

It is an amenable number.

19506347869 is a deficient number, since it is larger than the sum of its proper divisors (1).

19506347869 is an equidigital number, since it uses as much as digits as its factorization.

19506347869 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 9797760, while the sum is 58.

The spelling of 19506347869 in words is "nineteen billion, five hundred six million, three hundred forty-seven thousand, eight hundred sixty-nine".