20321263526321 has 8 divisors (see below), whose sum is σ = 20330520566400. Its totient is φ = 20312008517200.

The previous prime is 20321263526309. The next prime is 20321263526329. The reversal of 20321263526321 is 12362536212302.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20321263526321 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20321263526329) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 19690871 + ... + 20697171.

It is an arithmetic number, because the mean of its divisors is an integer number (2541315070800).

Almost surely, 2^{20321263526321} is an apocalyptic number.

It is an amenable number.

20321263526321 is a deficient number, since it is larger than the sum of its proper divisors (9257040079).

20321263526321 is a wasteful number, since it uses less digits than its factorization.

20321263526321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1015479.

The product of its (nonzero) digits is 155520, while the sum is 38.

Adding to 20321263526321 its reverse (12362536212302), we get a palindrome (32683799738623).

The spelling of 20321263526321 in words is "twenty trillion, three hundred twenty-one billion, two hundred sixty-three million, five hundred twenty-six thousand, three hundred twenty-one".