18291230 has 16 divisors (see below), whose sum is σ = 32973264. Its totient is φ = 7305600.

The previous prime is 18291179. The next prime is 18291241. The reversal of 18291230 is 3219281.

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 18291230.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11249 + ... + 12771.

It is an arithmetic number, because the mean of its divisors is an integer number (2060829).

Almost surely, 2^18291230 is an apocalyptic number.

18291230 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

18291230 is a deficient number, since it is larger than the sum of its proper divisors (14682034).

18291230 is a wasteful number, since it uses less digits than its factorization.

18291230 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2731.

The product of its (nonzero) digits is 864, while the sum is 26.

The square root of 18291230 is about 4276.8247567559. The cubic root of 18291230 is about 263.4799891667.

The spelling of 18291230 in words is "eighteen million, two hundred ninety-one thousand, two hundred thirty".