18345003 has 4 divisors (see below), whose sum is σ = 24460008. Its totient is φ = 12230000.

The previous prime is 18344987. The next prime is 18345011. The reversal of 18345003 is 30054381.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 18345003 - 2⁴ = 18344987 is a prime.

It is not an unprimeable number, because it can be changed into a prime (18345083) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3057498 + ... + 3057503.

It is an arithmetic number, because the mean of its divisors is an integer number (6115002).

Almost surely, 2^18345003 is an apocalyptic number.

18345003 is a deficient number, since it is larger than the sum of its proper divisors (6115005).

18345003 is an equidigital number, since it uses as much as digits as its factorization.

18345003 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6115004.

The product of its (nonzero) digits is 1440, while the sum is 24.

The square root of 18345003 is about 4283.1066995815. The cubic root of 18345003 is about 263.7379315098.

Adding to 18345003 its reverse (30054381), we get a palindrome (48399384).

The spelling of 18345003 in words is "eighteen million, three hundred forty-five thousand, three".