20310131111 has 12 divisors (see below), whose sum is σ = 21441152952. Its totient is φ = 19235965104.

The previous prime is 20310131077. The next prime is 20310131119. The reversal of 20310131111 is 11113101302.

It is a happy number.

It is not a de Polignac number, because 20310131111 - 2¹⁸ = 20309868967 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 (20310131119) 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, 2261516 + ... + 2270478.

It is an arithmetic number, because the mean of its divisors is an integer number (1786762746).

Almost surely, 2^20310131111 is an apocalyptic number.

20310131111 is a deficient number, since it is larger than the sum of its proper divisors (1131021841).

20310131111 is an equidigital number, since it uses as much as digits as its factorization.

20310131111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15278 (or 15259 counting only the distinct ones).

The product of its (nonzero) digits is 18, while the sum is 14.

Adding to 20310131111 its reverse (11113101302), we get a palindrome (31423232413).

The spelling of 20310131111 in words is "twenty billion, three hundred ten million, one hundred thirty-one thousand, one hundred eleven".