18618103 has 8 divisors (see below), whose sum is σ = 21341600. Its totient is φ = 15910560.

The previous prime is 18618101. The next prime is 18618133. The reversal of 18618103 is 30181681.

It is a happy number.

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 18618103 - 2¹ = 18618101 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18618101) 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, 1368 + ... + 6253.

It is an arithmetic number, because the mean of its divisors is an integer number (2667700).

Almost surely, 2^18618103 is an apocalyptic number.

18618103 is a deficient number, since it is larger than the sum of its proper divisors (2723497).

18618103 is an equidigital number, since it uses as much as digits as its factorization.

18618103 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7977.

The product of its (nonzero) digits is 1152, while the sum is 28.

The square root of 18618103 is about 4314.8699864538. The cubic root of 18618103 is about 265.0402359695.

Adding to 18618103 its reverse (30181681), we get a palindrome (48799784).

It can be divided in two parts, 18618 and 103, that added together give a triangular number (18721 = T₁₉₃).

The spelling of 18618103 in words is "eighteen million, six hundred eighteen thousand, one hundred three".