18853320673 has 4 divisors (see below), whose sum is σ = 20567258928. Its totient is φ = 17139382420.

The previous prime is 18853320611. The next prime is 18853320677. The reversal of 18853320673 is 37602335881.

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: 37602335881 = 11 ⋅3418394171.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-18853320673 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (18853320677) 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, 856969111 + ... + 856969132.

It is an arithmetic number, because the mean of its divisors is an integer number (5141814732).

Almost surely, 2^18853320673 is an apocalyptic number.

It is an amenable number.

18853320673 is a deficient number, since it is larger than the sum of its proper divisors (1713938255).

18853320673 is a wasteful number, since it uses less digits than its factorization.

18853320673 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1713938254.

The product of its (nonzero) digits is 725760, while the sum is 46.

The spelling of 18853320673 in words is "eighteen billion, eight hundred fifty-three million, three hundred twenty thousand, six hundred seventy-three".