18130233 has 16 divisors (see below), whose sum is σ = 27518976. Its totient is φ = 10509840.

The previous prime is 18130213. The next prime is 18130243. The reversal of 18130233 is 33203181.

It is a happy number.

It is not a de Polignac number, because 18130233 - 2⁸ = 18129977 is a prime.

It is not an unprimeable number, because it can be changed into a prime (18130213) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 11185 + ... + 12702.

It is an arithmetic number, because the mean of its divisors is an integer number (1719936).

Almost surely, 2^18130233 is an apocalyptic number.

It is an amenable number.

18130233 is a deficient number, since it is larger than the sum of its proper divisors (9388743).

18130233 is a wasteful number, since it uses less digits than its factorization.

18130233 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23924.

The product of its (nonzero) digits is 432, while the sum is 21.

The square root of 18130233 is about 4257.9611318094. The cubic root of 18130233 is about 262.7046712154.

The spelling of 18130233 in words is "eighteen million, one hundred thirty thousand, two hundred thirty-three".