18848538881 has 4 divisors (see below), whose sum is σ = 18852985392. Its totient is φ = 18844092372.

The previous prime is 18848538851. The next prime is 18848538937. The reversal of 18848538881 is 18883584881.

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-18848538881 is a prime.

It is a super-2 number, since 2×18848538881² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (18848538851) 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, 2216891 + ... + 2225376.

It is an arithmetic number, because the mean of its divisors is an integer number (4713246348).

Almost surely, 2^18848538881 is an apocalyptic number.

It is an amenable number.

18848538881 is a deficient number, since it is larger than the sum of its proper divisors (4446511).

18848538881 is an equidigital number, since it uses as much as digits as its factorization.

18848538881 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4446510.

The product of its digits is 15728640, while the sum is 62.

The spelling of 18848538881 in words is "eighteen billion, eight hundred forty-eight million, five hundred thirty-eight thousand, eight hundred eighty-one".