18055171801103 has 4 divisors (see below), whose sum is σ = 18104368454880. Its totient is φ = 18005975147328.

The previous prime is 18055171801033. The next prime is 18055171801127. The reversal of 18055171801103 is 30110817155081.

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 18055171801103 - 2¹⁰ = 18055171800079 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18055171801153) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 24598326338 + ... + 24598327071.

It is an arithmetic number, because the mean of its divisors is an integer number (4526092113720).

Almost surely, 2^{18055171801103} is an apocalyptic number.

18055171801103 is a deficient number, since it is larger than the sum of its proper divisors (49196653777).

18055171801103 is an equidigital number, since it uses as much as digits as its factorization.

18055171801103 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 49196653776.

The product of its (nonzero) digits is 33600, while the sum is 41.

Adding to 18055171801103 its reverse (30110817155081), we get a palindrome (48165988956184).

The spelling of 18055171801103 in words is "eighteen trillion, fifty-five billion, one hundred seventy-one million, eight hundred one thousand, one hundred three".