20041405123 has 4 divisors (see below), whose sum is σ = 20042942680. Its totient is φ = 20039867568.

The previous prime is 20041405121. The next prime is 20041405133. The reversal of 20041405123 is 32150414002.

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 20041405123 - 2¹ = 20041405121 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20041405094 and 20041405103.

It is not an unprimeable number, because it can be changed into a prime (20041405121) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 749058 + ... + 775351.

It is an arithmetic number, because the mean of its divisors is an integer number (5010735670).

Almost surely, 2^20041405123 is an apocalyptic number.

20041405123 is a deficient number, since it is larger than the sum of its proper divisors (1537557).

20041405123 is a wasteful number, since it uses less digits than its factorization.

20041405123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1537556.

The product of its (nonzero) digits is 960, while the sum is 22.

Adding to 20041405123 its reverse (32150414002), we get a palindrome (52191819125).

The spelling of 20041405123 in words is "twenty billion, forty-one million, four hundred five thousand, one hundred twenty-three".