18621230 has 8 divisors (see below), whose sum is σ = 33518232. Its totient is φ = 7448488.

The previous prime is 18621227. The next prime is 18621247. The reversal of 18621230 is 3212681.

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

It is a junction number, because it is equal to n+sod(n) for n = 18621196 and 18621205.

It is a congruent number.

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 3 ways as a sum of consecutive naturals, for example, 931052 + ... + 931071.

It is an arithmetic number, because the mean of its divisors is an integer number (4189779).

Almost surely, 2^18621230 is an apocalyptic number.

18621230 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

18621230 is a deficient number, since it is larger than the sum of its proper divisors (14897002).

18621230 is a wasteful number, since it uses less digits than its factorization.

18621230 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1862130.

The product of its (nonzero) digits is 576, while the sum is 23.

The square root of 18621230 is about 4315.2323228304. The cubic root of 18621230 is about 265.0550734000.

The spelling of 18621230 in words is "eighteen million, six hundred twenty-one thousand, two hundred thirty".