18208230 has 32 divisors (see below), whose sum is σ = 45208800. Its totient is φ = 4687872.

The previous prime is 18208189. The next prime is 18208231. The reversal of 18208230 is 3280281.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 18208230.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18208231) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 9595 + ... + 11334.

It is an arithmetic number, because the mean of its divisors is an integer number (1412775).

Almost surely, 2^18208230 is an apocalyptic number.

18208230 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

18208230 is an abundant number, since it is smaller than the sum of its proper divisors (27000570).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

18208230 is a wasteful number, since it uses less digits than its factorization.

18208230 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20968.

The product of its (nonzero) digits is 768, while the sum is 24.

The square root of 18208230 is about 4267.1102633984. The cubic root of 18208230 is about 263.0808543396.

The spelling of 18208230 in words is "eighteen million, two hundred eight thousand, two hundred thirty".