18041771717 has 4 divisors (see below), whose sum is σ = 18047230656. Its totient is φ = 18036312780.

The previous prime is 18041771681. The next prime is 18041771777. The reversal of 18041771717 is 71717714081.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 18041771717 - 2²⁴ = 18024994501 is a prime.

It is a super-2 number, since 2×18041771717² (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 (18041771777) 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 3 ways as a sum of consecutive naturals, for example, 2724509 + ... + 2731122.

It is an arithmetic number, because the mean of its divisors is an integer number (4511807664).

Almost surely, 2^18041771717 is an apocalyptic number.

It is an amenable number.

18041771717 is a deficient number, since it is larger than the sum of its proper divisors (5458939).

18041771717 is an equidigital number, since it uses as much as digits as its factorization.

18041771717 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5458938.

The product of its (nonzero) digits is 76832, while the sum is 44.

The spelling of 18041771717 in words is "eighteen billion, forty-one million, seven hundred seventy-one thousand, seven hundred seventeen".