20310311131 has 12 divisors (see below), whose sum is σ = 22843738456. Its totient is φ = 18034521120.

The previous prime is 20310311107. The next prime is 20310311141. The reversal of 20310311131 is 13111301302.

It is not a de Polignac number, because 20310311131 - 2⁹ = 20310310619 is a prime.

It is a super-2 number, since 2×20310311131² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (20310311141) 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, 1946586 + ... + 1956991.

Almost surely, 2^20310311131 is an apocalyptic number.

20310311131 is a deficient number, since it is larger than the sum of its proper divisors (2533427325).

20310311131 is a wasteful number, since it uses less digits than its factorization.

20310311131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3903642 (or 3903631 counting only the distinct ones).

The product of its (nonzero) digits is 54, while the sum is 16.

Adding to 20310311131 its reverse (13111301302), we get a palindrome (33421612433).

The spelling of 20310311131 in words is "twenty billion, three hundred ten million, three hundred eleven thousand, one hundred thirty-one".