20313311223 has 16 divisors (see below), whose sum is σ = 27173827296. Its totient is φ = 13497538560.

The previous prime is 20313311191. The next prime is 20313311233. The reversal of 20313311223 is 32211331302.

It is not a de Polignac number, because 20313311223 - 2⁵ = 20313311191 is a prime.

It is a super-2 number, since 2×20313311223² (a number of 21 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 20313311223.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20313311233) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3747211 + ... + 3752627.

It is an arithmetic number, because the mean of its divisors is an integer number (1698364206).

Almost surely, 2^20313311223 is an apocalyptic number.

20313311223 is a deficient number, since it is larger than the sum of its proper divisors (6860516073).

20313311223 is a wasteful number, since it uses less digits than its factorization.

20313311223 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9314.

The product of its (nonzero) digits is 648, while the sum is 21.

Adding to 20313311223 its reverse (32211331302), we get a palindrome (52524642525).

The spelling of 20313311223 in words is "twenty billion, three hundred thirteen million, three hundred eleven thousand, two hundred twenty-three".