18098 has 4 divisors (see below), whose sum is σ = 27150. Its totient is φ = 9048.

The previous prime is 18097. The next prime is 18119. The reversal of 18098 is 89081.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 89081 = 229 ⋅389.

It can be written as a sum of positive squares in only one way, i.e., 12769 + 5329 = 113^2 + 73^2 .

It is a plaindrome in base 15.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 18098.

It is not an unprimeable number, because it can be changed into a prime (18097) 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 as a sum of consecutive naturals, namely, 4523 + ... + 4526.

2¹⁸⁰⁹⁸ is an apocalyptic number.

18098 is a deficient number, since it is larger than the sum of its proper divisors (9052).

18098 is an equidigital number, since it uses as much as digits as its factorization.

18098 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9051.

The product of its (nonzero) digits is 576, while the sum is 26.

The square root of 18098 is about 134.5288073239. The cubic root of 18098 is about 26.2548894898.

The spelling of 18098 in words is "eighteen thousand, ninety-eight".