18618230 has 16 divisors (see below), whose sum is σ = 35484480. Its totient is φ = 7009152.

The previous prime is 18618227. The next prime is 18618253. The reversal of 18618230 is 3281681.

It is a junction number, because it is equal to n+sod(n) for n = 18618193 and 18618202.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 54590 + ... + 54929.

It is an arithmetic number, because the mean of its divisors is an integer number (2217780).

Almost surely, 2^18618230 is an apocalyptic number.

18618230 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

18618230 is a deficient number, since it is larger than the sum of its proper divisors (16866250).

18618230 is a wasteful number, since it uses less digits than its factorization.

18618230 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 109543.

The product of its (nonzero) digits is 2304, while the sum is 29.

The square root of 18618230 is about 4314.8847029787. The cubic root of 18618230 is about 265.0408386094.

The spelling of 18618230 in words is "eighteen million, six hundred eighteen thousand, two hundred thirty".