20313120231 has 12 divisors (see below), whose sum is σ = 29822177320. Its totient is φ = 13320078480.

The previous prime is 20313120227. The next prime is 20313120241. The reversal of 20313120231 is 13202131302.

20313120231 is a `hidden beast` number, since 2 + 0 + 313 + 120 + 231 = 666.

It is not a de Polignac number, because 20313120231 - 2² = 20313120227 is a prime.

It is a super-2 number, since 2×20313120231² (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 (20313120221) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 18499561 + ... + 18500658.

Almost surely, 2^20313120231 is an apocalyptic number.

20313120231 is a deficient number, since it is larger than the sum of its proper divisors (9509057089).

20313120231 is a wasteful number, since it uses less digits than its factorization.

20313120231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 37000286 (or 37000283 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 18.

Adding to 20313120231 its reverse (13202131302), we get a palindrome (33515251533).

The spelling of 20313120231 in words is "twenty billion, three hundred thirteen million, one hundred twenty thousand, two hundred thirty-one".