18306105318 has 48 divisors (see below), whose sum is σ = 40234764960. Its totient is φ = 6014224512.

The previous prime is 18306105271. The next prime is 18306105347. The reversal of 18306105318 is 81350160381.

18306105318 is a `hidden beast` number, since 1 + 8 + 3 + 0 + 610 + 5 + 31 + 8 = 666.

It is a super-2 number, since 2×18306105318² (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 23 ways as a sum of consecutive naturals, for example, 2273143 + ... + 2281181.

It is an arithmetic number, because the mean of its divisors is an integer number (838224270).

Almost surely, 2^18306105318 is an apocalyptic number.

18306105318 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

18306105318 is an abundant number, since it is smaller than the sum of its proper divisors (21928659642).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

18306105318 is a wasteful number, since it uses less digits than its factorization.

18306105318 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9853 (or 9850 counting only the distinct ones).

The product of its (nonzero) digits is 17280, while the sum is 36.

Adding to 18306105318 its reverse (81350160381), we get a palindrome (99656265699).

The spelling of 18306105318 in words is "eighteen billion, three hundred six million, one hundred five thousand, three hundred eighteen".