18614855717 has 4 divisors (see below), whose sum is σ = 18615497856. Its totient is φ = 18614213580.

The previous prime is 18614855669. The next prime is 18614855761. The reversal of 18614855717 is 71755841681.

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, and also an emirpimes, since its reverse is a distinct semiprime: 71755841681 = 199 ⋅360582119.

It is a cyclic number.

It is not a de Polignac number, because 18614855717 - 2²⁶ = 18547746853 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 (18614855797) 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, 275423 + ... + 336284.

It is an arithmetic number, because the mean of its divisors is an integer number (4653874464).

Almost surely, 2^18614855717 is an apocalyptic number.

It is an amenable number.

18614855717 is a deficient number, since it is larger than the sum of its proper divisors (642139).

18614855717 is an equidigital number, since it uses as much as digits as its factorization.

18614855717 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 642138.

The product of its digits is 1881600, while the sum is 53.

The spelling of 18614855717 in words is "eighteen billion, six hundred fourteen million, eight hundred fifty-five thousand, seven hundred seventeen".