18205302103 has 4 divisors (see below), whose sum is σ = 18274524048. Its totient is φ = 18136080160.

The previous prime is 18205302047. The next prime is 18205302113. The reversal of 18205302103 is 30120350281.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 18205302103 - 2¹⁷ = 18205171031 is a prime.

It is a super-2 number, since 2×18205302103² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18205302113) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 34610578 + ... + 34611103.

It is an arithmetic number, because the mean of its divisors is an integer number (4568631012).

Almost surely, 2^18205302103 is an apocalyptic number.

18205302103 is a deficient number, since it is larger than the sum of its proper divisors (69221945).

18205302103 is an equidigital number, since it uses as much as digits as its factorization.

18205302103 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 69221944.

The product of its (nonzero) digits is 1440, while the sum is 25.

Adding to 18205302103 its reverse (30120350281), we get a palindrome (48325652384).

The spelling of 18205302103 in words is "eighteen billion, two hundred five million, three hundred two thousand, one hundred three".