18689486 has 4 divisors (see below), whose sum is σ = 28034232. Its totient is φ = 9344742.

The previous prime is 18689441. The next prime is 18689491. The reversal of 18689486 is 68498681.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4672370 + ... + 4672373.

It is an arithmetic number, because the mean of its divisors is an integer number (7008558).

Almost surely, 2^18689486 is an apocalyptic number.

18689486 is a deficient number, since it is larger than the sum of its proper divisors (9344746).

18689486 is an equidigital number, since it uses as much as digits as its factorization.

18689486 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9344745.

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

The square root of 18689486 is about 4323.1338170360. The cubic root of 18689486 is about 265.3785310719.

The spelling of 18689486 in words is "eighteen million, six hundred eighty-nine thousand, four hundred eighty-six".