18338889622945 has 8 divisors (see below), whose sum is σ = 22601442346344. Its totient is φ = 14274595165824.

The previous prime is 18338889622927. The next prime is 18338889622961. The reversal of 18338889622945 is 54922698883381.

It can be written as a sum of positive squares in 4 ways, for example, as 6818302771344 + 11520586851601 = 2611188^2 + 3394199^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 18338889622945 - 2¹¹ = 18338889620897 is a prime.

It is a Duffinian number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 49564566364 + ... + 49564566733.

It is an arithmetic number, because the mean of its divisors is an integer number (2825180293293).

Almost surely, 2^{18338889622945} is an apocalyptic number.

It is an amenable number.

18338889622945 is a deficient number, since it is larger than the sum of its proper divisors (4262552723399).

18338889622945 is an equidigital number, since it uses as much as digits as its factorization.

18338889622945 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 99129133139.

The product of its digits is 1433272320, while the sum is 76.

The spelling of 18338889622945 in words is "eighteen trillion, three hundred thirty-eight billion, eight hundred eighty-nine million, six hundred twenty-two thousand, nine hundred forty-five".