20311313303 has 4 divisors (see below), whose sum is σ = 20311839528. Its totient is φ = 20310787080.

The previous prime is 20311313287. The next prime is 20311313339. The reversal of 20311313303 is 30331311302.

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

It is a cyclic number.

It is not a de Polignac number, because 20311313303 - 2⁴ = 20311313287 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20311313353) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 200201 + ... + 284082.

It is an arithmetic number, because the mean of its divisors is an integer number (5077959882).

Almost surely, 2^20311313303 is an apocalyptic number.

20311313303 is a deficient number, since it is larger than the sum of its proper divisors (526225).

20311313303 is an equidigital number, since it uses as much as digits as its factorization.

20311313303 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 526224.

The product of its (nonzero) digits is 486, while the sum is 20.

Adding to 20311313303 its reverse (30331311302), we get a palindrome (50642624605).

The spelling of 20311313303 in words is "twenty billion, three hundred eleven million, three hundred thirteen thousand, three hundred three".