18039458 has 8 divisors (see below), whose sum is σ = 27932160. Its totient is φ = 8728740.

The previous prime is 18039449. The next prime is 18039491. The reversal of 18039458 is 85493081.

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

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 145418 + ... + 145541.

It is an arithmetic number, because the mean of its divisors is an integer number (3491520).

Almost surely, 2^18039458 is an apocalyptic number.

18039458 is a deficient number, since it is larger than the sum of its proper divisors (9892702).

18039458 is a wasteful number, since it uses less digits than its factorization.

18039458 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 290992.

The product of its (nonzero) digits is 34560, while the sum is 38.

The square root of 18039458 is about 4247.2883113817. The cubic root of 18039458 is about 262.2654982067.

The spelling of 18039458 in words is "eighteen million, thirty-nine thousand, four hundred fifty-eight".