20113131113 has 4 divisors (see below), whose sum is σ = 20113779840. Its totient is φ = 20112482388.

The previous prime is 20113131107. The next prime is 20113131133. The reversal of 20113131113 is 31113131102.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 20113131113 - 2¹² = 20113127017 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20113131091 and 20113131100.

It is not an unprimeable number, because it can be changed into a prime (20113131133) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 275393 + ... + 340686.

It is an arithmetic number, because the mean of its divisors is an integer number (5028444960).

Almost surely, 2^20113131113 is an apocalyptic number.

It is an amenable number.

20113131113 is a deficient number, since it is larger than the sum of its proper divisors (648727).

20113131113 is an equidigital number, since it uses as much as digits as its factorization.

20113131113 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 648726.

The product of its (nonzero) digits is 54, while the sum is 17.

Adding to 20113131113 its reverse (31113131102), we get a palindrome (51226262215).

The spelling of 20113131113 in words is "twenty billion, one hundred thirteen million, one hundred thirty-one thousand, one hundred thirteen".