18025248907321 has 4 divisors (see below), whose sum is σ = 18646809214500. Its totient is φ = 17403688600144.

The previous prime is 18025248907307. The next prime is 18025248907339. The reversal of 18025248907321 is 12370984252081.

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

It can be written as a sum of positive squares in 2 ways, for example, as 3693837988096 + 14331410919225 = 1921936^2 + 3785685^2 .

It is a cyclic number.

It is not a de Polignac number, because 18025248907321 - 2⁹ = 18025248906809 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (18025248907361) 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 in 3 ways as a sum of consecutive naturals, for example, 310780153546 + ... + 310780153603.

It is an arithmetic number, because the mean of its divisors is an integer number (4661702303625).

Almost surely, 2^{18025248907321} is an apocalyptic number.

It is an amenable number.

18025248907321 is a deficient number, since it is larger than the sum of its proper divisors (621560307179).

18025248907321 is an equidigital number, since it uses as much as digits as its factorization.

18025248907321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 621560307178.

The product of its (nonzero) digits is 1935360, while the sum is 52.

The spelling of 18025248907321 in words is "eighteen trillion, twenty-five billion, two hundred forty-eight million, nine hundred seven thousand, three hundred twenty-one".