18126489 has 4 divisors (see below), whose sum is σ = 24168656. Its totient is φ = 12084324.

The previous prime is 18126481. The next prime is 18126491. The reversal of 18126489 is 98462181.

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 not a de Polignac number, because 18126489 - 2³ = 18126481 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (18126481) 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 3 ways as a sum of consecutive naturals, for example, 3021079 + ... + 3021084.

It is an arithmetic number, because the mean of its divisors is an integer number (6042164).

Almost surely, 2^18126489 is an apocalyptic number.

It is an amenable number.

18126489 is a deficient number, since it is larger than the sum of its proper divisors (6042167).

18126489 is an equidigital number, since it uses as much as digits as its factorization.

18126489 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6042166.

The product of its digits is 27648, while the sum is 39.

The square root of 18126489 is about 4257.5214620716. The cubic root of 18126489 is about 262.6865866160.

The spelling of 18126489 in words is "eighteen million, one hundred twenty-six thousand, four hundred eighty-nine".