18749584643 has 4 divisors (see below), whose sum is σ = 18758910168. Its totient is φ = 18740259120.

The previous prime is 18749584619. The next prime is 18749584661. The reversal of 18749584643 is 34648594781.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 34648594781 = 683 ⋅50730007.

It is a cyclic number.

It is not a de Polignac number, because 18749584643 - 2¹² = 18749580547 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (18749584043) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4659746 + ... + 4663767.

It is an arithmetic number, because the mean of its divisors is an integer number (4689727542).

Almost surely, 2^18749584643 is an apocalyptic number.

18749584643 is a deficient number, since it is larger than the sum of its proper divisors (9325525).

18749584643 is an equidigital number, since it uses as much as digits as its factorization.

18749584643 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9325524.

The product of its digits is 23224320, while the sum is 59.

The spelling of 18749584643 in words is "eighteen billion, seven hundred forty-nine million, five hundred eighty-four thousand, six hundred forty-three".