18108707347 has 4 divisors (see below), whose sum is σ = 18529840120. Its totient is φ = 17687574576.

The previous prime is 18108707341. The next prime is 18108707371. The reversal of 18108707347 is 74370780181.

It is a happy number.

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 18108707347 - 2³ = 18108707339 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 18108707297 and 18108707306.

It is not an unprimeable number, because it can be changed into a prime (18108707341) 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, 210566322 + ... + 210566407.

It is an arithmetic number, because the mean of its divisors is an integer number (4632460030).

Almost surely, 2^18108707347 is an apocalyptic number.

18108707347 is a deficient number, since it is larger than the sum of its proper divisors (421132773).

18108707347 is an equidigital number, since it uses as much as digits as its factorization.

18108707347 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 421132772.

The product of its (nonzero) digits is 263424, while the sum is 46.

The spelling of 18108707347 in words is "eighteen billion, one hundred eight million, seven hundred seven thousand, three hundred forty-seven".