20113031323231 has 64 divisors (see below), whose sum is σ = 26205114765312. Its totient is φ = 14984040960000.

The previous prime is 20113031323213. The next prime is 20113031323249. The reversal of 20113031323231 is 13232313031102.

It is an interprime number because it is at equal distance from previous prime (20113031323213) and next prime (20113031323249).

It is not a de Polignac number, because 20113031323231 - 2³¹ = 20110883839583 is a prime.

It is a super-2 number, since 2×20113031323231² (a number of 27 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 20113031323196 and 20113031323205.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20113031323261) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 51995671 + ... + 52381063.

It is an arithmetic number, because the mean of its divisors is an integer number (409454918208).

Almost surely, 2^{20113031323231} is an apocalyptic number.

20113031323231 is a deficient number, since it is larger than the sum of its proper divisors (6092083442081).

20113031323231 is a wasteful number, since it uses less digits than its factorization.

20113031323231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 385784.

The product of its (nonzero) digits is 1944, while the sum is 25.

Adding to 20113031323231 its reverse (13232313031102), we get a palindrome (33345344354333).

The spelling of 20113031323231 in words is "twenty trillion, one hundred thirteen billion, thirty-one million, three hundred twenty-three thousand, two hundred thirty-one".