18071786107 has 4 divisors (see below), whose sum is σ = 18129895056. Its totient is φ = 18013677160.

The previous prime is 18071786099. The next prime is 18071786137. The reversal of 18071786107 is 70168717081.

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 18071786107 - 2³ = 18071786099 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (18071786137) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 29054008 + ... + 29054629.

It is an arithmetic number, because the mean of its divisors is an integer number (4532473764).

Almost surely, 2^18071786107 is an apocalyptic number.

18071786107 is a deficient number, since it is larger than the sum of its proper divisors (58108949).

18071786107 is an equidigital number, since it uses as much as digits as its factorization.

18071786107 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 58108948.

The product of its (nonzero) digits is 131712, while the sum is 46.

The spelling of 18071786107 in words is "eighteen billion, seventy-one million, seven hundred eighty-six thousand, one hundred seven".