19307308457 has 2 divisors, whose sum is σ = 19307308458. Its totient is φ = 19307308456.

The previous prime is 19307308409. The next prime is 19307308519. The reversal of 19307308457 is 75480370391.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 14002225561 + 5305082896 = 118331^2 + 72836^2 .

It is a cyclic number.

It is not a de Polignac number, because 19307308457 - 2⁸ = 19307308201 is a prime.

It is not a weakly prime, because it can be changed into another prime (19307308157) 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, 9653654228 + 9653654229.

It is an arithmetic number, because the mean of its divisors is an integer number (9653654229).

Almost surely, 2^19307308457 is an apocalyptic number.

It is an amenable number.

19307308457 is a deficient number, since it is larger than the sum of its proper divisors (1).

19307308457 is an equidigital number, since it uses as much as digits as its factorization.

19307308457 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 635040, while the sum is 47.

The spelling of 19307308457 in words is "nineteen billion, three hundred seven million, three hundred eight thousand, four hundred fifty-seven".