18138103 has 8 divisors (see below), whose sum is σ = 19609520. Its totient is φ = 16718400.

The previous prime is 18138101. The next prime is 18138119. The reversal of 18138103 is 30183181.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 18138103 - 2¹ = 18138101 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18138101) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12198 + ... + 13603.

It is an arithmetic number, because the mean of its divisors is an integer number (2451190).

Almost surely, 2^18138103 is an apocalyptic number.

18138103 is a deficient number, since it is larger than the sum of its proper divisors (1471417).

18138103 is a wasteful number, since it uses less digits than its factorization.

18138103 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25857.

The product of its (nonzero) digits is 576, while the sum is 25.

The square root of 18138103 is about 4258.8851827679. The cubic root of 18138103 is about 262.7426774687.

The spelling of 18138103 in words is "eighteen million, one hundred thirty-eight thousand, one hundred three".