20311321303 has 16 divisors (see below), whose sum is σ = 25804957696. Its totient is φ = 15552090720.

The previous prime is 20311321301. The next prime is 20311321333. The reversal of 20311321303 is 30312311302.

It is a cyclic number.

It is not a de Polignac number, because 20311321303 - 2¹ = 20311321301 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20311321301) 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 15 ways as a sum of consecutive naturals, for example, 3597201 + ... + 3602842.

It is an arithmetic number, because the mean of its divisors is an integer number (1612809856).

Almost surely, 2^20311321303 is an apocalyptic number.

20311321303 is a deficient number, since it is larger than the sum of its proper divisors (5493636393).

20311321303 is a wasteful number, since it uses less digits than its factorization.

20311321303 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7200094.

The product of its (nonzero) digits is 324, while the sum is 19.

Adding to 20311321303 its reverse (30312311302), we get a palindrome (50623632605).

The spelling of 20311321303 in words is "twenty billion, three hundred eleven million, three hundred twenty-one thousand, three hundred three".