18311423927 has 8 divisors (see below), whose sum is σ = 18528273072. Its totient is φ = 18095272000.

The previous prime is 18311423917. The next prime is 18311423929. The reversal of 18311423927 is 72932411381.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 18311423927 - 2²² = 18307229623 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 (18311423929) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 121373 + ... + 226614.

It is an arithmetic number, because the mean of its divisors is an integer number (2316034134).

Almost surely, 2^18311423927 is an apocalyptic number.

18311423927 is a deficient number, since it is larger than the sum of its proper divisors (216849145).

18311423927 is a wasteful number, since it uses less digits than its factorization.

18311423927 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 348609.

The product of its digits is 72576, while the sum is 41.

The spelling of 18311423927 in words is "eighteen billion, three hundred eleven million, four hundred twenty-three thousand, nine hundred twenty-seven".