2118000981 has 32 divisors (see below), whose sum is σ = 3036787200. Its totient is φ = 1308303360.

The previous prime is 2118000967. The next prime is 2118001013. The reversal of 2118000981 is 1890008112.

It is not a de Polignac number, because 2118000981 - 2⁵ = 2118000949 is a prime.

It is a super-2 number, since 2×2118000981² = 8971856311033924722, which contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2118000961) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2098605 + ... + 2099613.

It is an arithmetic number, because the mean of its divisors is an integer number (94899600).

Almost surely, 2^2118000981 is an apocalyptic number.

2118000981 is the 26571-st octagonal number.

It is an amenable number.

2118000981 is a deficient number, since it is larger than the sum of its proper divisors (918786219).

2118000981 is a wasteful number, since it uses less digits than its factorization.

2118000981 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1629.

The product of its (nonzero) digits is 1152, while the sum is 30.

The square root of 2118000981 is about 46021.7446540220. The cubic root of 2118000981 is about 1284.2277566642.

The spelling of 2118000981 in words is "two billion, one hundred eighteen million, nine hundred eighty-one", and thus it is an aban number.