19408326523 has 2 divisors, whose sum is σ = 19408326524. Its totient is φ = 19408326522.

The previous prime is 19408326491. The next prime is 19408326547. The reversal of 19408326523 is 32562380491.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 19408326523 - 2⁵ = 19408326491 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 19408326523.

It is not a weakly prime, because it can be changed into another prime (19408326583) 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, 9704163261 + 9704163262.

It is an arithmetic number, because the mean of its divisors is an integer number (9704163262).

Almost surely, 2^19408326523 is an apocalyptic number.

19408326523 is a deficient number, since it is larger than the sum of its proper divisors (1).

19408326523 is an equidigital number, since it uses as much as digits as its factorization.

19408326523 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 311040, while the sum is 43.

The spelling of 19408326523 in words is "nineteen billion, four hundred eight million, three hundred twenty-six thousand, five hundred twenty-three".