18500002618 has 8 divisors (see below), whose sum is σ = 28645165440. Its totient is φ = 8951614140.

The previous prime is 18500002613. The next prime is 18500002639. The reversal of 18500002618 is 81620000581.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a Harshad number since it is a multiple of its sum of digits (31).

It is a self number, because there is not a number n which added to its sum of digits gives 18500002618.

It is not an unprimeable number, because it can be changed into a prime (18500002613) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 149193508 + ... + 149193631.

It is an arithmetic number, because the mean of its divisors is an integer number (3580645680).

Almost surely, 2^18500002618 is an apocalyptic number.

18500002618 is a deficient number, since it is larger than the sum of its proper divisors (10145162822).

18500002618 is a wasteful number, since it uses less digits than its factorization.

18500002618 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 298387172.

The product of its (nonzero) digits is 3840, while the sum is 31.

The spelling of 18500002618 in words is "eighteen billion, five hundred million, two thousand, six hundred eighteen".