18944245843 has 4 divisors (see below), whose sum is σ = 18957303288. Its totient is φ = 18931188400.

The previous prime is 18944245829. The next prime is 18944245847. The reversal of 18944245843 is 34854244981.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 34854244981 = 4759 ⋅7323859.

It is a cyclic number.

It is not a de Polignac number, because 18944245843 - 2²¹ = 18942148691 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (18944245847) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6526546 + ... + 6529447.

It is an arithmetic number, because the mean of its divisors is an integer number (4739325822).

Almost surely, 2^18944245843 is an apocalyptic number.

18944245843 is a deficient number, since it is larger than the sum of its proper divisors (13057445).

18944245843 is a wasteful number, since it uses less digits than its factorization.

18944245843 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13057444.

The product of its digits is 4423680, while the sum is 52.

The spelling of 18944245843 in words is "eighteen billion, nine hundred forty-four million, two hundred forty-five thousand, eight hundred forty-three".