918558018 has 36 divisors (see below), whose sum is σ = 2315143350. Its totient is φ = 262444896.

The previous prime is 918558013. The next prime is 918558019. The reversal of 918558018 is 810855819.

918558018 is a `hidden beast` number, since 91 + 8 + 558 + 0 + 1 + 8 = 666.

It can be written as a sum of positive squares in only one way, i.e., 741854169 + 176703849 = 27237^2 + 13293^2 .

It is a Smith number, since the sum of its digits (45) coincides with the sum of the digits of its prime factors.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (918558013) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 519843 + ... + 521606.

Almost surely, 2^918558018 is an apocalyptic number.

918558018 is a gapful number since it is divisible by the number (98) formed by its first and last digit.

918558018 is an abundant number, since it is smaller than the sum of its proper divisors (1396585332).

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

918558018 is a wasteful number, since it uses less digits than its factorization.

918558018 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1041471 (or 1041461 counting only the distinct ones).

The product of its (nonzero) digits is 115200, while the sum is 45.

The square root of 918558018 is about 30307.7220853036. The cubic root of 918558018 is about 972.0804244281.

The spelling of 918558018 in words is "nine hundred eighteen million, five hundred fifty-eight thousand, eighteen".