19573459823 has 2 divisors, whose sum is σ = 19573459824. Its totient is φ = 19573459822.

The previous prime is 19573459769. The next prime is 19573459853. The reversal of 19573459823 is 32895437591.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 19573459823 - 2⁸ = 19573459567 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (19573459853) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9786729911 + 9786729912.

It is an arithmetic number, because the mean of its divisors is an integer number (9786729912).

Almost surely, 2^19573459823 is an apocalyptic number.

19573459823 is a deficient number, since it is larger than the sum of its proper divisors (1).

19573459823 is an equidigital number, since it uses as much as digits as its factorization.

19573459823 is an evil number, because the sum of its binary digits is even.

The product of its digits is 8164800, while the sum is 56.

The spelling of 19573459823 in words is "nineteen billion, five hundred seventy-three million, four hundred fifty-nine thousand, eight hundred twenty-three".