18086869 has 4 divisors (see below), whose sum is σ = 18471744. Its totient is φ = 17701996.

The previous prime is 18086837. The next prime is 18086881. The reversal of 18086869 is 96868081.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 18086869 - 2⁵ = 18086837 is a prime.

It is a super-2 number, since 2×18086869² = 654269660446322, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

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 3 ways as a sum of consecutive naturals, for example, 192367 + ... + 192460.

It is an arithmetic number, because the mean of its divisors is an integer number (4617936).

Almost surely, 2^18086869 is an apocalyptic number.

It is an amenable number.

18086869 is a deficient number, since it is larger than the sum of its proper divisors (384875).

18086869 is an equidigital number, since it uses as much as digits as its factorization.

18086869 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 384874.

The product of its (nonzero) digits is 165888, while the sum is 46.

The square root of 18086869 is about 4252.8659748457. The cubic root of 18086869 is about 262.4950578057.

The spelling of 18086869 in words is "eighteen million, eighty-six thousand, eight hundred sixty-nine".