18505435318 has 8 divisors (see below), whose sum is σ = 27804495600. Its totient is φ = 9237270120.

The previous prime is 18505435283. The next prime is 18505435367. The reversal of 18505435318 is 81353450581.

It is a happy number.

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

It is a super-2 number, since 2×18505435318² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7722273 + ... + 7724668.

It is an arithmetic number, because the mean of its divisors is an integer number (3475561950).

Almost surely, 2^18505435318 is an apocalyptic number.

18505435318 is a deficient number, since it is larger than the sum of its proper divisors (9299060282).

18505435318 is a wasteful number, since it uses less digits than its factorization.

18505435318 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15447542.

The product of its (nonzero) digits is 288000, while the sum is 43.

Adding to 18505435318 its reverse (81353450581), we get a palindrome (99858885899).

The spelling of 18505435318 in words is "eighteen billion, five hundred five million, four hundred thirty-five thousand, three hundred eighteen".