20124104243 has 4 divisors (see below), whose sum is σ = 20773268928. Its totient is φ = 19474939560.

The previous prime is 20124104227. The next prime is 20124104261. The reversal of 20124104243 is 34240142102.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 20124104243 - 2⁴ = 20124104227 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20124104213) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 324582296 + ... + 324582357.

It is an arithmetic number, because the mean of its divisors is an integer number (5193317232).

Almost surely, 2^20124104243 is an apocalyptic number.

20124104243 is a deficient number, since it is larger than the sum of its proper divisors (649164685).

20124104243 is an equidigital number, since it uses as much as digits as its factorization.

20124104243 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 649164684.

The product of its (nonzero) digits is 1536, while the sum is 23.

Adding to 20124104243 its reverse (34240142102), we get a palindrome (54364246345).

The spelling of 20124104243 in words is "twenty billion, one hundred twenty-four million, one hundred four thousand, two hundred forty-three".