18486869 has 8 divisors (see below), whose sum is σ = 18817920. Its totient is φ = 18158400.

The previous prime is 18486863. The next prime is 18486887. The reversal of 18486869 is 96868481.

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 18486869 - 2²⁰ = 17438293 is a prime.

It is a super-2 number, since 2×18486869² = 683528650846322, 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 (18486863) 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, 18554 + ... + 19524.

It is an arithmetic number, because the mean of its divisors is an integer number (2352240).

Almost surely, 2^18486869 is an apocalyptic number.

It is an amenable number.

18486869 is a deficient number, since it is larger than the sum of its proper divisors (331051).

18486869 is an equidigital number, since it uses as much as digits as its factorization.

18486869 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1291.

The product of its digits is 663552, while the sum is 50.

The square root of 18486869 is about 4299.6359148188. The cubic root of 18486869 is about 264.4160346114.

The spelling of 18486869 in words is "eighteen million, four hundred eighty-six thousand, eight hundred sixty-nine".