18342489 has 16 divisors (see below), whose sum is σ = 26889984. Its totient is φ = 11029200.

The previous prime is 18342487. The next prime is 18342497. The reversal of 18342489 is 98424381.

It is not a de Polignac number, because 18342489 - 2¹ = 18342487 is a prime.

It is not an unprimeable number, because it can be changed into a prime (18342481) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2202 + ... + 6444.

It is an arithmetic number, because the mean of its divisors is an integer number (1680624).

Almost surely, 2^18342489 is an apocalyptic number.

It is an amenable number.

18342489 is a deficient number, since it is larger than the sum of its proper divisors (8547495).

18342489 is a wasteful number, since it uses less digits than its factorization.

18342489 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4388.

The product of its digits is 55296, while the sum is 39.

The square root of 18342489 is about 4282.8132109631. The cubic root of 18342489 is about 263.7258834069.

The spelling of 18342489 in words is "eighteen million, three hundred forty-two thousand, four hundred eighty-nine".