18103005 has 24 divisors (see below), whose sum is σ = 31508568. Its totient is φ = 9614976.

The previous prime is 18103003. The next prime is 18103049. The reversal of 18103005 is 50030181.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 11737476 + 6365529 = 3426^2 + 2523^2 .

It is not a de Polignac number, because 18103005 - 2¹ = 18103003 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18103003) 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 23 ways as a sum of consecutive naturals, for example, 12499 + ... + 13871.

It is an arithmetic number, because the mean of its divisors is an integer number (1312857).

Almost surely, 2^18103005 is an apocalyptic number.

18103005 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

18103005 is a deficient number, since it is larger than the sum of its proper divisors (13405563).

18103005 is a wasteful number, since it uses less digits than its factorization.

18103005 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1677 (or 1674 counting only the distinct ones).

The product of its (nonzero) digits is 120, while the sum is 18.

The square root of 18103005 is about 4254.7626255762. The cubic root of 18103005 is about 262.5730952904.

Adding to 18103005 its reverse (50030181), we get a palindrome (68133186).

The spelling of 18103005 in words is "eighteen million, one hundred three thousand, five".