18305230 has 8 divisors (see below), whose sum is σ = 32949432. Its totient is φ = 7322088.

The previous prime is 18305219. The next prime is 18305233. The reversal of 18305230 is 3250381.

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

It is an alternating number because its digits alternate between odd and even.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18305233) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 915252 + ... + 915271.

It is an arithmetic number, because the mean of its divisors is an integer number (4118679).

Almost surely, 2^18305230 is an apocalyptic number.

18305230 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

18305230 is a deficient number, since it is larger than the sum of its proper divisors (14644202).

18305230 is a wasteful number, since it uses less digits than its factorization.

18305230 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1830530.

The product of its (nonzero) digits is 720, while the sum is 22.

The square root of 18305230 is about 4278.4611719636. The cubic root of 18305230 is about 263.5471940356.

The spelling of 18305230 in words is "eighteen million, three hundred five thousand, two hundred thirty".