18087115 has 8 divisors (see below), whose sum is σ = 21732048. Its totient is φ = 14451360.

The previous prime is 18087103. The next prime is 18087169. The reversal of 18087115 is 51178081.

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

It is not a de Polignac number, because 18087115 - 2¹⁵ = 18054347 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3280 + ... + 6850.

It is an arithmetic number, because the mean of its divisors is an integer number (2716506).

Almost surely, 2^18087115 is an apocalyptic number.

18087115 is a deficient number, since it is larger than the sum of its proper divisors (3644933).

18087115 is a wasteful number, since it uses less digits than its factorization.

18087115 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4589.

The product of its (nonzero) digits is 2240, while the sum is 31.

The square root of 18087115 is about 4252.8948964206. The cubic root of 18087115 is about 262.4962478678.

The spelling of 18087115 in words is "eighteen million, eighty-seven thousand, one hundred fifteen".