18386386699 has 4 divisors (see below), whose sum is σ = 18777586464. Its totient is φ = 17995186936.

The previous prime is 18386386687. The next prime is 18386386709. The reversal of 18386386699 is 99668368381.

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 18386386699 - 2²³ = 18377998091 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (18386386199) 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, 195599812 + ... + 195599905.

It is an arithmetic number, because the mean of its divisors is an integer number (4694396616).

Almost surely, 2^18386386699 is an apocalyptic number.

18386386699 is a deficient number, since it is larger than the sum of its proper divisors (391199765).

18386386699 is an equidigital number, since it uses as much as digits as its factorization.

18386386699 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 391199764.

The product of its digits is 80621568, while the sum is 67.

The spelling of 18386386699 in words is "eighteen billion, three hundred eighty-six million, three hundred eighty-six thousand, six hundred ninety-nine".