18081087 has 8 divisors (see below), whose sum is σ = 24127920. Its totient is φ = 12044160.

The previous prime is 18081083. The next prime is 18081097. The reversal of 18081087 is 78018081.

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

It is not a de Polignac number, because 18081087 - 2² = 18081083 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18081083) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5089 + ... + 7877.

It is an arithmetic number, because the mean of its divisors is an integer number (3015990).

Almost surely, 2^18081087 is an apocalyptic number.

18081087 is a deficient number, since it is larger than the sum of its proper divisors (6046833).

18081087 is a wasteful number, since it uses less digits than its factorization.

18081087 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4953.

The product of its (nonzero) digits is 3584, while the sum is 33.

The square root of 18081087 is about 4252.1861436207. The cubic root of 18081087 is about 262.4670834009.

The spelling of 18081087 in words is "eighteen million, eighty-one thousand, eighty-seven".