18726847679 has 4 divisors (see below), whose sum is σ = 18727158384. Its totient is φ = 18726536976.

The previous prime is 18726847673. The next prime is 18726847723. The reversal of 18726847679 is 97674862781.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 97674862781 = 163 ⋅599232287.

It is a cyclic number.

It is not a de Polignac number, because 18726847679 - 2⁸ = 18726847423 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 (18726847673) 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, 32627 + ... + 196260.

It is an arithmetic number, because the mean of its divisors is an integer number (4681789596).

Almost surely, 2^18726847679 is an apocalyptic number.

18726847679 is a deficient number, since it is larger than the sum of its proper divisors (310705).

18726847679 is an equidigital number, since it uses as much as digits as its factorization.

18726847679 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 310704.

The product of its digits is 56899584, while the sum is 65.

The spelling of 18726847679 in words is "eighteen billion, seven hundred twenty-six million, eight hundred forty-seven thousand, six hundred seventy-nine".