18748395139 has 4 divisors (see below), whose sum is σ = 18755454024. Its totient is φ = 18741336256.

The previous prime is 18748395121. The next prime is 18748395143. The reversal of 18748395139 is 93159384781.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 18748395139 - 2¹⁹ = 18747870851 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (18748395439) 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, 3525457 + ... + 3530770.

It is an arithmetic number, because the mean of its divisors is an integer number (4688863506).

Almost surely, 2^18748395139 is an apocalyptic number.

18748395139 is a deficient number, since it is larger than the sum of its proper divisors (7058885).

18748395139 is an equidigital number, since it uses as much as digits as its factorization.

18748395139 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7058884.

The product of its digits is 6531840, while the sum is 58.

The spelling of 18748395139 in words is "eighteen billion, seven hundred forty-eight million, three hundred ninety-five thousand, one hundred thirty-nine".