9009018 has 12 divisors (see below), whose sum is σ = 19519578. Its totient is φ = 3003000.

The previous prime is 9009017. The next prime is 9009023. The reversal of 9009018 is 8109009.

It can be written as a sum of positive squares in only one way, i.e., 7112889 + 1896129 = 2667^2 + 1377^2 .

It is a junction number, because it is equal to n+sod(n) for n = 9008982 and 9009000.

It is not an unprimeable number, because it can be changed into a prime (9009017) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 250233 + ... + 250268.

Almost surely, 2^9009018 is an apocalyptic number.

9009018 is an abundant number, since it is smaller than the sum of its proper divisors (10510560).

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

9009018 is a wasteful number, since it uses less digits than its factorization.

9009018 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 500509 (or 500506 counting only the distinct ones).

The product of its (nonzero) digits is 648, while the sum is 27.

The square root of 9009018 is about 3001.5026236870. The cubic root of 9009018 is about 208.0778339132.

Subtracting from 9009018 its reverse (8109009), we obtain a palindrome (900009).

The spelling of 9009018 in words is "nine million, nine thousand, eighteen".