20104124123 has 4 divisors (see below), whose sum is σ = 20752644288. Its totient is φ = 19455603960.

The previous prime is 20104124083. The next prime is 20104124147. The reversal of 20104124123 is 32142140102.

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 20104124123 - 2⁸ = 20104123867 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20104124095 and 20104124104.

It is not an unprimeable number, because it can be changed into a prime (20104124723) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 324260036 + ... + 324260097.

It is an arithmetic number, because the mean of its divisors is an integer number (5188161072).

Almost surely, 2^20104124123 is an apocalyptic number.

20104124123 is a deficient number, since it is larger than the sum of its proper divisors (648520165).

20104124123 is an equidigital number, since it uses as much as digits as its factorization.

20104124123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 648520164.

The product of its (nonzero) digits is 384, while the sum is 20.

Adding to 20104124123 its reverse (32142140102), we get a palindrome (52246264225).

The spelling of 20104124123 in words is "twenty billion, one hundred four million, one hundred twenty-four thousand, one hundred twenty-three".