18178360147 has 4 divisors (see below), whose sum is σ = 18669667216. Its totient is φ = 17687053080.

The previous prime is 18178360097. The next prime is 18178360157. The reversal of 18178360147 is 74106387181.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-18178360147 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 18178360097 and 18178360106.

It is not an unprimeable number, because it can be changed into a prime (18178360157) 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, 245653479 + ... + 245653552.

It is an arithmetic number, because the mean of its divisors is an integer number (4667416804).

Almost surely, 2^18178360147 is an apocalyptic number.

18178360147 is a deficient number, since it is larger than the sum of its proper divisors (491307069).

18178360147 is an equidigital number, since it uses as much as digits as its factorization.

18178360147 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 491307068.

The product of its (nonzero) digits is 225792, while the sum is 46.

The spelling of 18178360147 in words is "eighteen billion, one hundred seventy-eight million, three hundred sixty thousand, one hundred forty-seven".