20311123113 has 8 divisors (see below), whose sum is σ = 30090552800. Its totient is φ = 13540748724.

The previous prime is 20311123109. The next prime is 20311123159. The reversal of 20311123113 is 31132111302.

It is not a de Polignac number, because 20311123113 - 2² = 20311123109 is a prime.

It is a super-2 number, since 2×20311123113² (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 (20311123103) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 376131883 + ... + 376131936.

It is an arithmetic number, because the mean of its divisors is an integer number (3761319100).

Almost surely, 2^20311123113 is an apocalyptic number.

It is an amenable number.

20311123113 is a deficient number, since it is larger than the sum of its proper divisors (9779429687).

20311123113 is an equidigital number, since it uses as much as digits as its factorization.

20311123113 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 752263828 (or 752263822 counting only the distinct ones).

The product of its (nonzero) digits is 108, while the sum is 18.

Adding to 20311123113 its reverse (31132111302), we get a palindrome (51443234415).

The spelling of 20311123113 in words is "twenty billion, three hundred eleven million, one hundred twenty-three thousand, one hundred thirteen".