18098987 has 8 divisors (see below), whose sum is σ = 18773040. Its totient is φ = 17428320.

The previous prime is 18098923. The next prime is 18099007. The reversal of 18098987 is 78989081.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 18098987 - 2⁶ = 18098923 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (18098287) 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, 16013 + ... + 17105.

It is an arithmetic number, because the mean of its divisors is an integer number (2346630).

Almost surely, 2^18098987 is an apocalyptic number.

18098987 is a deficient number, since it is larger than the sum of its proper divisors (674053).

18098987 is a wasteful number, since it uses less digits than its factorization.

18098987 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1693.

The product of its (nonzero) digits is 290304, while the sum is 50.

The square root of 18098987 is about 4254.2904226204. The cubic root of 18098987 is about 262.5536676362.

The spelling of 18098987 in words is "eighteen million, ninety-eight thousand, nine hundred eighty-seven".