20404205023127 has 16 divisors (see below), whose sum is σ = 21713048784000. Its totient is φ = 19119889054944.

The previous prime is 20404205023121. The next prime is 20404205023129. The reversal of 20404205023127 is 72132050240402.

It is a cyclic number.

It is not a de Polignac number, because 20404205023127 - 2²⁶ = 20404137914263 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20404205023093 and 20404205023102.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20404205023121) 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, 13650053 + ... + 15070910.

It is an arithmetic number, because the mean of its divisors is an integer number (1357065549000).

Almost surely, 2^{20404205023127} is an apocalyptic number.

20404205023127 is a deficient number, since it is larger than the sum of its proper divisors (1308843760873).

20404205023127 is a wasteful number, since it uses less digits than its factorization.

20404205023127 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28721390.

The product of its (nonzero) digits is 26880, while the sum is 32.

Adding to 20404205023127 its reverse (72132050240402), we get a palindrome (92536255263529).

The spelling of 20404205023127 in words is "twenty trillion, four hundred four billion, two hundred five million, twenty-three thousand, one hundred twenty-seven".