18020230 has 16 divisors (see below), whose sum is σ = 32503680. Its totient is φ = 7193152.

The previous prime is 18020203. The next prime is 18020231. The reversal of 18020230 is 3202081.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18020231) by changing a digit.

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, 4107 + ... + 7273.

It is an arithmetic number, because the mean of its divisors is an integer number (2031480).

Almost surely, 2^18020230 is an apocalyptic number.

18020230 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

18020230 is a deficient number, since it is larger than the sum of its proper divisors (14483450).

18020230 is a wasteful number, since it uses less digits than its factorization.

18020230 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3743.

The product of its (nonzero) digits is 96, while the sum is 16.

The square root of 18020230 is about 4245.0241459855. The cubic root of 18020230 is about 262.1722834002.

The spelling of 18020230 in words is "eighteen million, twenty thousand, two hundred thirty".