18612489 has 16 divisors (see below), whose sum is σ = 28464128. Its totient is φ = 10597392.

The previous prime is 18612469. The next prime is 18612499. The reversal of 18612489 is 98421681.

It is not a de Polignac number, because 18612489 - 2⁸ = 18612233 is a prime.

It is not an unprimeable number, because it can be changed into a prime (18612469) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5004 + ... + 7890.

It is an arithmetic number, because the mean of its divisors is an integer number (1779008).

Almost surely, 2^18612489 is an apocalyptic number.

It is an amenable number.

18612489 is a deficient number, since it is larger than the sum of its proper divisors (9851639).

18612489 is a wasteful number, since it uses less digits than its factorization.

18612489 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3204.

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

The square root of 18612489 is about 4314.2193963682. The cubic root of 18612489 is about 265.0135937016.

The spelling of 18612489 in words is "eighteen million, six hundred twelve thousand, four hundred eighty-nine".