18086859 has 12 divisors (see below), whose sum is σ = 29857776. Its totient is φ = 10335312.

The previous prime is 18086837. The next prime is 18086881. The reversal of 18086859 is 95868081.

It is an interprime number because it is at equal distance from previous prime (18086837) and next prime (18086881).

It is not a de Polignac number, because 18086859 - 2²³ = 9698251 is a prime.

It is a super-3 number, since 3×18086859³ (a number of 23 digits) contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (18086899) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 143484 + ... + 143609.

It is an arithmetic number, because the mean of its divisors is an integer number (2488148).

Almost surely, 2^18086859 is an apocalyptic number.

18086859 is a deficient number, since it is larger than the sum of its proper divisors (11770917).

18086859 is a wasteful number, since it uses less digits than its factorization.

18086859 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 287106 (or 287103 counting only the distinct ones).

The product of its (nonzero) digits is 138240, while the sum is 45.

The square root of 18086859 is about 4252.8647991677. The cubic root of 18086859 is about 262.4950094289.

The spelling of 18086859 in words is "eighteen million, eighty-six thousand, eight hundred fifty-nine".