20323231111 has 6 divisors (see below), whose sum is σ = 21589038200. Its totient is φ = 19127746656.

The previous prime is 20323231099. The next prime is 20323231133. The reversal of 20323231111 is 11113232302.

It is not a de Polignac number, because 20323231111 - 2¹³ = 20323222919 is a prime.

It is a super-2 number, since 2×20323231111² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20323231151) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 35161011 + ... + 35161588.

Almost surely, 2^20323231111 is an apocalyptic number.

20323231111 is a deficient number, since it is larger than the sum of its proper divisors (1265807089).

20323231111 is an equidigital number, since it uses as much as digits as its factorization.

20323231111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 70322633 (or 70322616 counting only the distinct ones).

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

Adding to 20323231111 its reverse (11113232302), we get a palindrome (31436463413).

The spelling of 20323231111 in words is "twenty billion, three hundred twenty-three million, two hundred thirty-one thousand, one hundred eleven".