99018 has 12 divisors (see below), whose sum is σ = 214578. Its totient is φ = 33000.

The previous prime is 99017. The next prime is 99023. The reversal of 99018 is 81099.

It can be written as a sum of positive squares in only one way, i.e., 56169 + 42849 = 237^2 + 207^2 .

It is a junction number, because it is equal to n+sod(n) for n = 98982 and 99000.

It is not an unprimeable number, because it can be changed into a prime (99013) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 2733 + ... + 2768.

2⁹⁹⁰¹⁸ is an apocalyptic number.

99018 is an abundant number, since it is smaller than the sum of its proper divisors (115560).

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

99018 is a wasteful number, since it uses less digits than its factorization.

99018 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5509 (or 5506 counting only the distinct ones).

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

The square root of 99018 is about 314.6712570287. The cubic root of 99018 is about 46.2634535977.

The spelling of 99018 in words is "ninety-nine thousand, eighteen".