18110285117 has 4 divisors (see below), whose sum is σ = 18214969020. Its totient is φ = 18005601216.

The previous prime is 18110285071. The next prime is 18110285131. The reversal of 18110285117 is 71158201181.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 71158201181 = 283 ⋅251442407.

It can be written as a sum of positive squares in 2 ways, for example, as 14999880676 + 3110404441 = 122474^2 + 55771^2 .

It is a cyclic number.

It is not a de Polignac number, because 18110285117 - 2⁸ = 18110284861 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 (18110285617) 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, 52341692 + ... + 52342037.

It is an arithmetic number, because the mean of its divisors is an integer number (4553742255).

Almost surely, 2^18110285117 is an apocalyptic number.

It is an amenable number.

18110285117 is a deficient number, since it is larger than the sum of its proper divisors (104683903).

18110285117 is a wasteful number, since it uses less digits than its factorization.

18110285117 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 104683902.

The product of its (nonzero) digits is 4480, while the sum is 35.

Adding to 18110285117 its reverse (71158201181), we get a palindrome (89268486298).

The spelling of 18110285117 in words is "eighteen billion, one hundred ten million, two hundred eighty-five thousand, one hundred seventeen".