18287208018 has 24 divisors (see below), whose sum is σ = 39652329756. Its totient is φ = 6091113600.

The previous prime is 18287208013. The next prime is 18287208029. The reversal of 18287208018 is 81080278281.

It can be written as a sum of positive squares in 2 ways, for example, as 18282555369 + 4652649 = 135213^2 + 2157^2 .

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (18287208011) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 360763 + ... + 408318.

Almost surely, 2^18287208018 is an apocalyptic number.

18287208018 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

18287208018 is an abundant number, since it is smaller than the sum of its proper divisors (21365121738).

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

18287208018 is a wasteful number, since it uses less digits than its factorization.

18287208018 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 770410 (or 770407 counting only the distinct ones).

The product of its (nonzero) digits is 114688, while the sum is 45.

The spelling of 18287208018 in words is "eighteen billion, two hundred eighty-seven million, two hundred eight thousand, eighteen".