18103123 has 2 divisors, whose sum is σ = 18103124. Its totient is φ = 18103122.

The previous prime is 18103121. The next prime is 18103133. The reversal of 18103123 is 32130181.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 18103123 - 2¹ = 18103121 is a prime.

Together with 18103121, it forms a pair of twin primes.

It is a self number, because there is not a number n which added to its sum of digits gives 18103123.

It is not a weakly prime, because it can be changed into another prime (18103121) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9051561 + 9051562.

It is an arithmetic number, because the mean of its divisors is an integer number (9051562).

Almost surely, 2^18103123 is an apocalyptic number.

18103123 is a deficient number, since it is larger than the sum of its proper divisors (1).

18103123 is an equidigital number, since it uses as much as digits as its factorization.

18103123 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 144, while the sum is 19.

The square root of 18103123 is about 4254.7764923671. The cubic root of 18103123 is about 262.5736657953.

The spelling of 18103123 in words is "eighteen million, one hundred three thousand, one hundred twenty-three".