20104404123 has 16 divisors (see below), whose sum is σ = 26886016800. Its totient is φ = 13362919680.

The previous prime is 20104404097. The next prime is 20104404149. The reversal of 20104404123 is 32140440102.

It is an interprime number because it is at equal distance from previous prime (20104404097) and next prime (20104404149).

It is not a de Polignac number, because 20104404123 - 2⁹ = 20104403611 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 20104404123.

It is not an unprimeable number, because it can be changed into a prime (20104400123) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1613943 + ... + 1626351.

It is an arithmetic number, because the mean of its divisors is an integer number (1680376050).

Almost surely, 2^20104404123 is an apocalyptic number.

20104404123 is a deficient number, since it is larger than the sum of its proper divisors (6781612677).

20104404123 is a wasteful number, since it uses less digits than its factorization.

20104404123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13982.

The product of its (nonzero) digits is 768, while the sum is 21.

Adding to 20104404123 its reverse (32140440102), we get a palindrome (52244844225).

The spelling of 20104404123 in words is "twenty billion, one hundred four million, four hundred four thousand, one hundred twenty-three".