18009043 has 8 divisors (see below), whose sum is σ = 19450368. Its totient is φ = 16575744.

The previous prime is 18009031. The next prime is 18009049. The reversal of 18009043 is 34090081.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-18009043 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 18008999 and 18009017.

It is not an unprimeable number, because it can be changed into a prime (18009049) 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 7 ways as a sum of consecutive naturals, for example, 3171 + ... + 6787.

It is an arithmetic number, because the mean of its divisors is an integer number (2431296).

Almost surely, 2^18009043 is an apocalyptic number.

18009043 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

18009043 is a deficient number, since it is larger than the sum of its proper divisors (1441325).

18009043 is a wasteful number, since it uses less digits than its factorization.

18009043 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4013.

The product of its (nonzero) digits is 864, while the sum is 25.

The square root of 18009043 is about 4243.7062810708. The cubic root of 18009043 is about 262.1180197853.

The spelling of 18009043 in words is "eighteen million, nine thousand, forty-three".