20231123311 has 32 divisors (see below), whose sum is σ = 25024167936. Its totient is φ = 15975036000.

The previous prime is 20231123261. The next prime is 20231123327. The reversal of 20231123311 is 11332113202.

It is not a de Polignac number, because 20231123311 - 2¹⁵ = 20231090543 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20231123371) 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, 1043496 + ... + 1062706.

It is an arithmetic number, because the mean of its divisors is an integer number (782005248).

Almost surely, 2^20231123311 is an apocalyptic number.

20231123311 is a deficient number, since it is larger than the sum of its proper divisors (4793044625).

20231123311 is a wasteful number, since it uses less digits than its factorization.

20231123311 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19483.

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

Adding to 20231123311 its reverse (11332113202), we get a palindrome (31563236513).

The spelling of 20231123311 in words is "twenty billion, two hundred thirty-one million, one hundred twenty-three thousand, three hundred eleven".