20313323311 has 4 divisors (see below), whose sum is σ = 20323171872. Its totient is φ = 20303474752.

The previous prime is 20313323309. The next prime is 20313323323. The reversal of 20313323311 is 11332331302.

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 20313323311 - 2¹ = 20313323309 is a prime.

It is a super-2 number, since 2×20313323311² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20313321311) 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, 4921186 + ... + 4925311.

It is an arithmetic number, because the mean of its divisors is an integer number (5080792968).

Almost surely, 2^20313323311 is an apocalyptic number.

20313323311 is a deficient number, since it is larger than the sum of its proper divisors (9848561).

20313323311 is an equidigital number, since it uses as much as digits as its factorization.

20313323311 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9848560.

The product of its (nonzero) digits is 972, while the sum is 22.

Adding to 20313323311 its reverse (11332331302), we get a palindrome (31645654613).

The spelling of 20313323311 in words is "twenty billion, three hundred thirteen million, three hundred twenty-three thousand, three hundred eleven".