20340231111123 has 24 divisors (see below), whose sum is σ = 34068486273024. Its totient is φ = 10566353822640.

The previous prime is 20340231111059. The next prime is 20340231111197. The reversal of 20340231111123 is 32111113204302.

It is not a de Polignac number, because 20340231111123 - 2⁶ = 20340231111059 is a prime.

It is a super-2 number, since 2×20340231111123² (a number of 27 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 20340231111093 and 20340231111102.

It is not an unprimeable number, because it can be changed into a prime (20340231115123) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 4002404211 + ... + 4002409292.

It is an arithmetic number, because the mean of its divisors is an integer number (1419520261376).

Almost surely, 2^{20340231111123} is an apocalyptic number.

20340231111123 is a deficient number, since it is larger than the sum of its proper divisors (13728255161901).

20340231111123 is a wasteful number, since it uses less digits than its factorization.

20340231111123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8004813535 (or 8004813524 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 24.

Adding to 20340231111123 its reverse (32111113204302), we get a palindrome (52451344315425).

The spelling of 20340231111123 in words is "twenty trillion, three hundred forty billion, two hundred thirty-one million, one hundred eleven thousand, one hundred twenty-three".