18098019 has 8 divisors (see below), whose sum is σ = 26811920. Its totient is φ = 12065328.

The previous prime is 18097997. The next prime is 18098021. The reversal of 18098019 is 91089081.

It is not a de Polignac number, because 18098019 - 2⁸ = 18097763 is a prime.

It is a super-2 number, since 2×18098019² = 655076583448722, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (18098219) 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 7 ways as a sum of consecutive naturals, for example, 335122 + ... + 335175.

It is an arithmetic number, because the mean of its divisors is an integer number (3351490).

Almost surely, 2^18098019 is an apocalyptic number.

18098019 is a deficient number, since it is larger than the sum of its proper divisors (8713901).

18098019 is an equidigital number, since it uses as much as digits as its factorization.

18098019 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 670306 (or 670300 counting only the distinct ones).

The product of its (nonzero) digits is 5184, while the sum is 36.

The square root of 18098019 is about 4254.1766535959. The cubic root of 18098019 is about 262.5489867761.

The spelling of 18098019 in words is "eighteen million, ninety-eight thousand, nineteen".