18008930 has 16 divisors (see below), whose sum is σ = 32901120. Its totient is φ = 7095792.

The previous prime is 18008917. The next prime is 18008989. The reversal of 18008930 is 3980081.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 18008893 and 18008902.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 12770 + ... + 14109.

It is an arithmetic number, because the mean of its divisors is an integer number (2056320).

Almost surely, 2^18008930 is an apocalyptic number.

18008930 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

18008930 is a deficient number, since it is larger than the sum of its proper divisors (14892190).

18008930 is a wasteful number, since it uses less digits than its factorization.

18008930 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26953.

The product of its (nonzero) digits is 1728, while the sum is 29.

The square root of 18008930 is about 4243.6929672162. The cubic root of 18008930 is about 262.1174715533.

The spelling of 18008930 in words is "eighteen million, eight thousand, nine hundred thirty".