19423572823 has 4 divisors (see below), whose sum is σ = 19425674488. Its totient is φ = 19421471160.

The previous prime is 19423572821. The next prime is 19423572827. The reversal of 19423572823 is 32827532491.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 19423572823 - 2¹ = 19423572821 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19423572821) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1036908 + ... + 1055473.

It is an arithmetic number, because the mean of its divisors is an integer number (4856418622).

Almost surely, 2^19423572823 is an apocalyptic number.

19423572823 is a deficient number, since it is larger than the sum of its proper divisors (2101665).

19423572823 is an equidigital number, since it uses as much as digits as its factorization.

19423572823 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2101664.

The product of its digits is 725760, while the sum is 46.

The spelling of 19423572823 in words is "nineteen billion, four hundred twenty-three million, five hundred seventy-two thousand, eight hundred twenty-three".