18318514181 has 8 divisors (see below), whose sum is σ = 20001030624. Its totient is φ = 16638863920.

The previous prime is 18318514121. The next prime is 18318514183. The reversal of 18318514181 is 18141581381.

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

It is a cyclic number.

It is not a de Polignac number, because 18318514181 - 2¹⁸ = 18318252037 is a prime.

It is a super-2 number, since 2×18318514181² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18318514183) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 703166 + ... + 728751.

It is an arithmetic number, because the mean of its divisors is an integer number (2500128828).

Almost surely, 2^18318514181 is an apocalyptic number.

18318514181 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

18318514181 is a deficient number, since it is larger than the sum of its proper divisors (1682516443).

18318514181 is a wasteful number, since it uses less digits than its factorization.

18318514181 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1433091.

The product of its digits is 30720, while the sum is 41.

The spelling of 18318514181 in words is "eighteen billion, three hundred eighteen million, five hundred fourteen thousand, one hundred eighty-one".