19313568427 has 4 divisors (see below), whose sum is σ = 19313931880. Its totient is φ = 19313204976.

The previous prime is 19313568413. The next prime is 19313568433. The reversal of 19313568427 is 72486531391.

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 19313568427 - 2⁷ = 19313568299 is a prime.

It is a super-2 number, since 2×19313568427² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (19313568227) 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, 84777 + ... + 214042.

It is an arithmetic number, because the mean of its divisors is an integer number (4828482970).

Almost surely, 2^19313568427 is an apocalyptic number.

19313568427 is a deficient number, since it is larger than the sum of its proper divisors (363453).

19313568427 is an equidigital number, since it uses as much as digits as its factorization.

19313568427 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 363452.

The product of its digits is 1088640, while the sum is 49.

The spelling of 19313568427 in words is "nineteen billion, three hundred thirteen million, five hundred sixty-eight thousand, four hundred twenty-seven".