990990000018 has 64 divisors (see below), whose sum is σ = 2380756848000. Its totient is φ = 304486247232.

The previous prime is 990990000001. The next prime is 990990000019. The reversal of 990990000018 is 810000099099.

It is a super-2 number, since 2×990990000018² (a number of 25 digits) contains 22 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (990990000019) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 13014433 + ... + 13090356.

It is an arithmetic number, because the mean of its divisors is an integer number (37199325750).

Almost surely, 2^990990000018 is an apocalyptic number.

990990000018 is an abundant number, since it is smaller than the sum of its proper divisors (1389766847982).

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

990990000018 is a wasteful number, since it uses less digits than its factorization.

990990000018 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26104856 (or 26104850 counting only the distinct ones).

The product of its (nonzero) digits is 52488, while the sum is 45.

The spelling of 990990000018 in words is "nine hundred ninety billion, nine hundred ninety million, eighteen", and thus it is an aban number.