18111254317 has 8 divisors (see below), whose sum is σ = 20651747256. Its totient is φ = 15734664192.

The previous prime is 18111254303. The next prime is 18111254333. The reversal of 18111254317 is 71345211181.

It can be written as a sum of positive squares in 4 ways, for example, as 574608841 + 17536645476 = 23971^2 + 132426^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 18111254317 - 2²³ = 18102865709 is a prime.

It is a super-2 number, since 2×18111254317² (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 (18111254017) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 40975468 + ... + 40975909.

It is an arithmetic number, because the mean of its divisors is an integer number (2581468407).

Almost surely, 2^18111254317 is an apocalyptic number.

18111254317 is a gapful number since it is divisible by the number (17) formed by its first and last digit.

It is an amenable number.

18111254317 is a deficient number, since it is larger than the sum of its proper divisors (2540492939).

18111254317 is a wasteful number, since it uses less digits than its factorization.

18111254317 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 81951407.

The product of its digits is 6720, while the sum is 34.

Adding to 18111254317 its reverse (71345211181), we get a palindrome (89456465498).

The spelling of 18111254317 in words is "eighteen billion, one hundred eleven million, two hundred fifty-four thousand, three hundred seventeen".