20323223131 has 32 divisors (see below), whose sum is σ = 22067251200. Its totient is φ = 18671452800.

The previous prime is 20323223101. The next prime is 20323223143. The reversal of 20323223131 is 13132232302.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20323223131 is a prime.

It is a super-2 number, since 2×20323223131² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20323223101) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 10826565 + ... + 10828441.

It is an arithmetic number, because the mean of its divisors is an integer number (689601600).

Almost surely, 2^20323223131 is an apocalyptic number.

20323223131 is a deficient number, since it is larger than the sum of its proper divisors (1744028069).

20323223131 is a wasteful number, since it uses less digits than its factorization.

20323223131 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2139.

The product of its (nonzero) digits is 1296, while the sum is 22.

Adding to 20323223131 its reverse (13132232302), we get a palindrome (33455455433).

The spelling of 20323223131 in words is "twenty billion, three hundred twenty-three million, two hundred twenty-three thousand, one hundred thirty-one".