18512103 has 8 divisors (see below), whose sum is σ = 24755328. Its totient is φ = 12305144.

The previous prime is 18512069. The next prime is 18512107. The reversal of 18512103 is 30121581.

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 18512103 - 2¹³ = 18503911 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 18512103.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18512107) 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, 7851 + ... + 9932.

It is an arithmetic number, because the mean of its divisors is an integer number (3094416).

Almost surely, 2^18512103 is an apocalyptic number.

18512103 is a deficient number, since it is larger than the sum of its proper divisors (6243225).

18512103 is a wasteful number, since it uses less digits than its factorization.

18512103 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18133.

The product of its (nonzero) digits is 240, while the sum is 21.

The square root of 18512103 is about 4302.5693486567. The cubic root of 18512103 is about 264.5362864634.

Adding to 18512103 its reverse (30121581), we get a palindrome (48633684).

The spelling of 18512103 in words is "eighteen million, five hundred twelve thousand, one hundred three".