20323211131 has 16 divisors (see below), whose sum is σ = 20906426464. Its totient is φ = 19745316864.

The previous prime is 20323211101. The next prime is 20323211137. The reversal of 20323211131 is 13111232302.

It is a cyclic number.

It is not a de Polignac number, because 20323211131 - 2¹⁵ = 20323178363 is a prime.

It is a super-2 number, since 2×20323211131² (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 = 20323211099 and 20323211108.

It is not an unprimeable number, because it can be changed into a prime (20323211137) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7764535 + ... + 7767151.

It is an arithmetic number, because the mean of its divisors is an integer number (1306651654).

Almost surely, 2^20323211131 is an apocalyptic number.

20323211131 is a deficient number, since it is larger than the sum of its proper divisors (583215333).

20323211131 is a wasteful number, since it uses less digits than its factorization.

20323211131 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3550.

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

Adding to 20323211131 its reverse (13111232302), we get a palindrome (33434443433).

The spelling of 20323211131 in words is "twenty billion, three hundred twenty-three million, two hundred eleven thousand, one hundred thirty-one".