20311230442321 has 64 divisors (see below), whose sum is σ = 26792565198336. Its totient is φ = 14940237312000.

The previous prime is 20311230442297. The next prime is 20311230442379. The reversal of 20311230442321 is 12324403211302.

It is not a de Polignac number, because 20311230442321 - 2⁵ = 20311230442289 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 20311230442321.

It is not an unprimeable number, because it can be changed into a prime (20311230442381) 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 63 ways as a sum of consecutive naturals, for example, 1014486291 + ... + 1014506311.

It is an arithmetic number, because the mean of its divisors is an integer number (418633831224).

Almost surely, 2^{20311230442321} is an apocalyptic number.

It is an amenable number.

20311230442321 is a deficient number, since it is larger than the sum of its proper divisors (6481334756015).

20311230442321 is a wasteful number, since it uses less digits than its factorization.

20311230442321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28042.

The product of its (nonzero) digits is 6912, while the sum is 28.

Adding to 20311230442321 its reverse (12324403211302), we get a palindrome (32635633653623).

The spelling of 20311230442321 in words is "twenty trillion, three hundred eleven billion, two hundred thirty million, four hundred forty-two thousand, three hundred twenty-one".