20404511125207 has 16 divisors (see below), whose sum is σ = 22981693077504. Its totient is φ = 17947917900000.

The previous prime is 20404511125123. The next prime is 20404511125261. The reversal of 20404511125207 is 70252111540402.

It is not a de Polignac number, because 20404511125207 - 2¹⁹ = 20404510600919 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20404511125277) 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, 3562923 + ... + 7314604.

It is an arithmetic number, because the mean of its divisors is an integer number (1436355817344).

Almost surely, 2^{20404511125207} is an apocalyptic number.

20404511125207 is a deficient number, since it is larger than the sum of its proper divisors (2577181952297).

20404511125207 is a wasteful number, since it uses less digits than its factorization.

20404511125207 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10883070.

The product of its (nonzero) digits is 22400, while the sum is 34.

Adding to 20404511125207 its reverse (70252111540402), we get a palindrome (90656622665609).

The spelling of 20404511125207 in words is "twenty trillion, four hundred four billion, five hundred eleven million, one hundred twenty-five thousand, two hundred seven".