20325515445321 has 4 divisors (see below), whose sum is σ = 27100687260432. Its totient is φ = 13550343630212.

The previous prime is 20325515445311. The next prime is 20325515445439. The reversal of 20325515445321 is 12354451552302.

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-20325515445321 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (20325515445311) 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, 3387585907551 + ... + 3387585907556.

It is an arithmetic number, because the mean of its divisors is an integer number (6775171815108).

Almost surely, 2^{20325515445321} is an apocalyptic number.

It is an amenable number.

20325515445321 is a deficient number, since it is larger than the sum of its proper divisors (6775171815111).

20325515445321 is an equidigital number, since it uses as much as digits as its factorization.

20325515445321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6775171815110.

The product of its (nonzero) digits is 720000, while the sum is 42.

Adding to 20325515445321 its reverse (12354451552302), we get a palindrome (32679966997623).

The spelling of 20325515445321 in words is "twenty trillion, three hundred twenty-five billion, five hundred fifteen million, four hundred forty-five thousand, three hundred twenty-one".