20311340031 has 8 divisors (see below), whose sum is σ = 30090874160. Its totient is φ = 13540893336.

The previous prime is 20311340029. The next prime is 20311340051. The reversal of 20311340031 is 13004311302.

It is not a de Polignac number, because 20311340031 - 2¹ = 20311340029 is a prime.

It is a super-2 number, since 2×20311340031² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20311339986 and 20311340013.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20311340011) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 376135900 + ... + 376135953.

It is an arithmetic number, because the mean of its divisors is an integer number (3761359270).

Almost surely, 2^20311340031 is an apocalyptic number.

20311340031 is a deficient number, since it is larger than the sum of its proper divisors (9779534129).

20311340031 is an equidigital number, since it uses as much as digits as its factorization.

20311340031 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 752271862 (or 752271856 counting only the distinct ones).

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

Adding to 20311340031 its reverse (13004311302), we get a palindrome (33315651333).

The spelling of 20311340031 in words is "twenty billion, three hundred eleven million, three hundred forty thousand, thirty-one".