18305121 has 8 divisors (see below), whose sum is σ = 25066624. Its totient is φ = 11873520.

The previous prime is 18305117. The next prime is 18305129. The reversal of 18305121 is 12150381.

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

It is not a de Polignac number, because 18305121 - 2² = 18305117 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (18305129) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 82345 + ... + 82566.

It is an arithmetic number, because the mean of its divisors is an integer number (3133328).

Almost surely, 2^18305121 is an apocalyptic number.

It is an amenable number.

18305121 is a deficient number, since it is larger than the sum of its proper divisors (6761503).

18305121 is a wasteful number, since it uses less digits than its factorization.

18305121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 164951.

The product of its (nonzero) digits is 240, while the sum is 21.

The square root of 18305121 is about 4278.4484337199. The cubic root of 18305121 is about 263.5466709301.

The spelling of 18305121 in words is "eighteen million, three hundred five thousand, one hundred twenty-one".