18243003 has 16 divisors (see below), whose sum is σ = 25090560. Its totient is φ = 11784096.

The previous prime is 18242999. The next prime is 18243007. The reversal of 18243003 is 30034281.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (18242999) and next prime (18243007).

It is not a de Polignac number, because 18243003 - 2² = 18242999 is a prime.

It is not an unprimeable number, because it can be changed into a prime (18243007) 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, 14776 + ... + 15962.

It is an arithmetic number, because the mean of its divisors is an integer number (1568160).

Almost surely, 2^18243003 is an apocalyptic number.

18243003 is a deficient number, since it is larger than the sum of its proper divisors (6847557).

18243003 is a wasteful number, since it uses less digits than its factorization.

18243003 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1346.

The product of its (nonzero) digits is 576, while the sum is 21.

The square root of 18243003 is about 4271.1828572422. The cubic root of 18243003 is about 263.2482199249.

Adding to 18243003 its reverse (30034281), we get a palindrome (48277284).

The spelling of 18243003 in words is "eighteen million, two hundred forty-three thousand, three".