18147321778948 has 48 divisors (see below), whose sum is σ = 34104315168000. Its totient is φ = 8422940418048.

The previous prime is 18147321778939. The next prime is 18147321778979. The reversal of 18147321778948 is 84987712374181.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 168213 + ... + 6026851.

It is an arithmetic number, because the mean of its divisors is an integer number (710506566000).

Almost surely, 2^{18147321778948} is an apocalyptic number.

It is an amenable number.

18147321778948 is a deficient number, since it is larger than the sum of its proper divisors (15956993389052).

18147321778948 is a wasteful number, since it uses less digits than its factorization.

18147321778948 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5859484 (or 5859482 counting only the distinct ones).

The product of its digits is 151732224, while the sum is 70.

The spelling of 18147321778948 in words is "eighteen trillion, one hundred forty-seven billion, three hundred twenty-one million, seven hundred seventy-eight thousand, nine hundred forty-eight".