20312020113 has 16 divisors (see below), whose sum is σ = 33765436416. Its totient is φ = 10551698640.

The previous prime is 20312020073. The next prime is 20312020117. The reversal of 20312020113 is 31102021302.

It is not a de Polignac number, because 20312020113 - 2²⁴ = 20295242897 is a prime.

It is a super-2 number, since 2×20312020113² (a number of 21 digits) contains 22 as substring.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 20312020092 and 20312020101.

It is not an unprimeable number, because it can be changed into a prime (20312020117) 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, 43965181 + ... + 43965642.

It is an arithmetic number, because the mean of its divisors is an integer number (2110339776).

Almost surely, 2^20312020113 is an apocalyptic number.

It is an amenable number.

20312020113 is a deficient number, since it is larger than the sum of its proper divisors (13453416303).

20312020113 is a wasteful number, since it uses less digits than its factorization.

20312020113 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 87930844.

The product of its (nonzero) digits is 72, while the sum is 15.

Adding to 20312020113 its reverse (31102021302), we get a palindrome (51414041415).

The spelling of 20312020113 in words is "twenty billion, three hundred twelve million, twenty thousand, one hundred thirteen".