18099771318 has 12 divisors (see below), whose sum is σ = 39216171228. Its totient is φ = 6033257100.

The previous prime is 18099771311. The next prime is 18099771337. The reversal of 18099771318 is 81317799081.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18099771311) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 502771408 + ... + 502771443.

It is an arithmetic number, because the mean of its divisors is an integer number (3268014269).

Almost surely, 2^18099771318 is an apocalyptic number.

18099771318 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

18099771318 is an abundant number, since it is smaller than the sum of its proper divisors (21116399910).

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

18099771318 is a wasteful number, since it uses less digits than its factorization.

18099771318 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1005542859 (or 1005542856 counting only the distinct ones).

The product of its (nonzero) digits is 762048, while the sum is 54.

The spelling of 18099771318 in words is "eighteen billion, ninety-nine million, seven hundred seventy-one thousand, three hundred eighteen".