18783248717 has 4 divisors (see below), whose sum is σ = 18832809120. Its totient is φ = 18733688316.

The previous prime is 18783248689. The next prime is 18783248789. The reversal of 18783248717 is 71784238781.

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: 71784238781 = 4787 ⋅14995663.

It is a cyclic number.

It is not a de Polignac number, because 18783248717 - 2¹⁴ = 18783232333 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 (18783218717) 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, 24779633 + ... + 24780390.

It is an arithmetic number, because the mean of its divisors is an integer number (4708202280).

Almost surely, 2^18783248717 is an apocalyptic number.

It is an amenable number.

18783248717 is a deficient number, since it is larger than the sum of its proper divisors (49560403).

18783248717 is an equidigital number, since it uses as much as digits as its factorization.

18783248717 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 49560402.

The product of its digits is 4214784, while the sum is 56.

The spelling of 18783248717 in words is "eighteen billion, seven hundred eighty-three million, two hundred forty-eight thousand, seven hundred seventeen".