19307308409 has 2 divisors, whose sum is σ = 19307308410. Its totient is φ = 19307308408.

The previous prime is 19307308403. The next prime is 19307308457. The reversal of 19307308409 is 90480370391.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 12143378809 + 7163929600 = 110197^2 + 84640^2 .

It is an emirp because it is prime and its reverse (90480370391) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-19307308409 is a prime.

It is a super-2 number, since 2×19307308409² (a number of 21 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 19307308409.

It is not a weakly prime, because it can be changed into another prime (19307308403) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9653654204 + 9653654205.

It is an arithmetic number, because the mean of its divisors is an integer number (9653654205).

Almost surely, 2^19307308409 is an apocalyptic number.

It is an amenable number.

19307308409 is a deficient number, since it is larger than the sum of its proper divisors (1).

19307308409 is an equidigital number, since it uses as much as digits as its factorization.

19307308409 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 163296, while the sum is 44.

The spelling of 19307308409 in words is "nineteen billion, three hundred seven million, three hundred eight thousand, four hundred nine".