18127425791 has 4 divisors (see below), whose sum is σ = 18127743552. Its totient is φ = 18127108032.

The previous prime is 18127425787. The next prime is 18127425829. The reversal of 18127425791 is 19752472181.

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 18127425791 - 2² = 18127425787 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 (18127425721) 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 in 3 ways as a sum of consecutive naturals, for example, 47090 + ... + 196143.

It is an arithmetic number, because the mean of its divisors is an integer number (4531935888).

Almost surely, 2^18127425791 is an apocalyptic number.

18127425791 is a deficient number, since it is larger than the sum of its proper divisors (317761).

18127425791 is an equidigital number, since it uses as much as digits as its factorization.

18127425791 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 317760.

The product of its digits is 282240, while the sum is 47.

The spelling of 18127425791 in words is "eighteen billion, one hundred twenty-seven million, four hundred twenty-five thousand, seven hundred ninety-one".