18358103 has 4 divisors (see below), whose sum is σ = 18394680. Its totient is φ = 18321528.

The previous prime is 18358069. The next prime is 18358111. The reversal of 18358103 is 30185381.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 30185381 = 1093 ⋅27617.

It is a cyclic number.

It is not a de Polignac number, because 18358103 - 2⁸ = 18357847 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18358003) 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 3 ways as a sum of consecutive naturals, for example, 17525 + ... + 18542.

It is an arithmetic number, because the mean of its divisors is an integer number (4598670).

Almost surely, 2^18358103 is an apocalyptic number.

18358103 is a deficient number, since it is larger than the sum of its proper divisors (36577).

18358103 is an equidigital number, since it uses as much as digits as its factorization.

18358103 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36576.

The product of its (nonzero) digits is 2880, while the sum is 29.

The square root of 18358103 is about 4284.6356904642. The cubic root of 18358103 is about 263.8006941931.

The spelling of 18358103 in words is "eighteen million, three hundred fifty-eight thousand, one hundred three".