20311301131 has 16 divisors (see below), whose sum is σ = 23329635840. Its totient is φ = 17488746720.

The previous prime is 20311301111. The next prime is 20311301159. The reversal of 20311301131 is 13110311302.

It is a cyclic number.

It is not a de Polignac number, because 20311301131 - 2⁵ = 20311301099 is a prime.

It is a super-2 number, since 2×20311301131² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20311301111) 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, 1105486 + ... + 1123708.

It is an arithmetic number, because the mean of its divisors is an integer number (1458102240).

Almost surely, 2^20311301131 is an apocalyptic number.

20311301131 is a deficient number, since it is larger than the sum of its proper divisors (3018334709).

20311301131 is a wasteful number, since it uses less digits than its factorization.

20311301131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23586.

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

Adding to 20311301131 its reverse (13110311302), we get a palindrome (33421612433).

The spelling of 20311301131 in words is "twenty billion, three hundred eleven million, three hundred one thousand, one hundred thirty-one".