204040011405 has 16 divisors (see below), whose sum is σ = 326489091264. Its totient is φ = 108812981760.

The previous prime is 204040011379. The next prime is 204040011407. The reversal of 204040011405 is 504110040402.

It is a happy number.

It is not a de Polignac number, because 204040011405 - 2¹⁴ = 204039995021 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (204040011407) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 317956 + ... + 713565.

It is an arithmetic number, because the mean of its divisors is an integer number (20405568204).

Almost surely, 2^204040011405 is an apocalyptic number.

It is an amenable number.

204040011405 is a deficient number, since it is larger than the sum of its proper divisors (122449079859).

204040011405 is a wasteful number, since it uses less digits than its factorization.

204040011405 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1044716.

The product of its (nonzero) digits is 640, while the sum is 21.

Adding to 204040011405 its reverse (504110040402), we get a palindrome (708150051807).

The spelling of 204040011405 in words is "two hundred four billion, forty million, eleven thousand, four hundred five".