19845655339 has 2 divisors, whose sum is σ = 19845655340. Its totient is φ = 19845655338.

The previous prime is 19845655303. The next prime is 19845655369. The reversal of 19845655339 is 93355654891.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 19845655339 - 2¹¹ = 19845653291 is a prime.

It is not a weakly prime, because it can be changed into another prime (19845655369) 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, 9922827669 + 9922827670.

It is an arithmetic number, because the mean of its divisors is an integer number (9922827670).

Almost surely, 2^19845655339 is an apocalyptic number.

19845655339 is a deficient number, since it is larger than the sum of its proper divisors (1).

19845655339 is an equidigital number, since it uses as much as digits as its factorization.

19845655339 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 17496000, while the sum is 58.

The spelling of 19845655339 in words is "nineteen billion, eight hundred forty-five million, six hundred fifty-five thousand, three hundred thirty-nine".