18001081108 has 24 divisors (see below), whose sum is σ = 33365812032. Its totient is φ = 8468337024.

The previous prime is 18001081103. The next prime is 18001081177. The reversal of 18001081108 is 80118010081.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18001081103) 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, 175185 + ... + 258247.

It is an arithmetic number, because the mean of its divisors is an integer number (1390242168).

Almost surely, 2^18001081108 is an apocalyptic number.

It is an amenable number.

18001081108 is a deficient number, since it is larger than the sum of its proper divisors (15364730924).

18001081108 is a wasteful number, since it uses less digits than its factorization.

18001081108 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 86271 (or 86269 counting only the distinct ones).

The product of its (nonzero) digits is 512, while the sum is 28.

Adding to 18001081108 its reverse (80118010081), we get a palindrome (98119091189).

The spelling of 18001081108 in words is "eighteen billion, one million, eighty-one thousand, one hundred eight".