18847948541564 has 6 divisors (see below), whose sum is σ = 32983909947744. Its totient is φ = 9423974270780.

The previous prime is 18847948541561. The next prime is 18847948541603. The reversal of 18847948541564 is 46514584974881.

It is a junction number, because it is equal to n+sod(n) for n = 18847948541491 and 18847948541500.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18847948541561) 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 as a sum of consecutive naturals, namely, 2355993567692 + ... + 2355993567699.

It is an arithmetic number, because the mean of its divisors is an integer number (5497318324624).

Almost surely, 2^{18847948541564} is an apocalyptic number.

It is an amenable number.

18847948541564 is a deficient number, since it is larger than the sum of its proper divisors (14135961406180).

18847948541564 is a wasteful number, since it uses less digits than its factorization.

18847948541564 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4711987135395 (or 4711987135393 counting only the distinct ones).

The product of its digits is 1238630400, while the sum is 74.

The spelling of 18847948541564 in words is "eighteen trillion, eight hundred forty-seven billion, nine hundred forty-eight million, five hundred forty-one thousand, five hundred sixty-four".