18127686673 has 4 divisors (see below), whose sum is σ = 18166839808. Its totient is φ = 18088533540.

The previous prime is 18127686671. The next prime is 18127686679. The reversal of 18127686673 is 37668672181.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 37668672181 = 7 ⋅5381238883.

It is a cyclic number.

It is not a de Polignac number, because 18127686673 - 2¹ = 18127686671 is a prime.

It is a super-2 number, since 2×18127686673² (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 (18127686671) 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, 19575873 + ... + 19576798.

It is an arithmetic number, because the mean of its divisors is an integer number (4541709952).

Almost surely, 2^18127686673 is an apocalyptic number.

It is an amenable number.

18127686673 is a deficient number, since it is larger than the sum of its proper divisors (39153135).

18127686673 is an equidigital number, since it uses as much as digits as its factorization.

18127686673 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39153134.

The product of its digits is 4064256, while the sum is 55.

The spelling of 18127686673 in words is "eighteen billion, one hundred twenty-seven million, six hundred eighty-six thousand, six hundred seventy-three".