18359742673 has 4 divisors (see below), whose sum is σ = 18436561920. Its totient is φ = 18282923428.

The previous prime is 18359742659. The next prime is 18359742683. The reversal of 18359742673 is 37624795381.

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 a de Polignac number, because none of the positive numbers 2^k-18359742673 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (18359742623) 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, 38409265 + ... + 38409742.

It is an arithmetic number, because the mean of its divisors is an integer number (4609140480).

Almost surely, 2^18359742673 is an apocalyptic number.

It is an amenable number.

18359742673 is a deficient number, since it is larger than the sum of its proper divisors (76819247).

18359742673 is an equidigital number, since it uses as much as digits as its factorization.

18359742673 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 76819246.

The product of its digits is 7620480, while the sum is 55.

The spelling of 18359742673 in words is "eighteen billion, three hundred fifty-nine million, seven hundred forty-two thousand, six hundred seventy-three".