20113232131 has 4 divisors (see below), whose sum is σ = 20119043632. Its totient is φ = 20107420632.

The previous prime is 20113232129. The next prime is 20113232143. The reversal of 20113232131 is 13123231102.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 20113232131 - 2¹ = 20113232129 is a prime.

It is a super-2 number, since 2×20113232131² (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 = 20113232099 and 20113232108.

It is not an unprimeable number, because it can be changed into a prime (20113239131) 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, 2900556 + ... + 2907481.

It is an arithmetic number, because the mean of its divisors is an integer number (5029760908).

Almost surely, 2^20113232131 is an apocalyptic number.

20113232131 is a deficient number, since it is larger than the sum of its proper divisors (5811501).

20113232131 is an equidigital number, since it uses as much as digits as its factorization.

20113232131 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5811500.

The product of its (nonzero) digits is 216, while the sum is 19.

Adding to 20113232131 its reverse (13123231102), we get a palindrome (33236463233).

The spelling of 20113232131 in words is "twenty billion, one hundred thirteen million, two hundred thirty-two thousand, one hundred thirty-one".