20404031135 has 16 divisors (see below), whose sum is σ = 24557843520. Its totient is φ = 16274630400.

The previous prime is 20404031119. The next prime is 20404031233. The reversal of 20404031135 is 53113040402.

It is not a de Polignac number, because 20404031135 - 2⁴ = 20404031119 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 20404031135.

It is a congruent number.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 2517149 + ... + 2525241.

It is an arithmetic number, because the mean of its divisors is an integer number (1534865220).

Almost surely, 2^20404031135 is an apocalyptic number.

20404031135 is a deficient number, since it is larger than the sum of its proper divisors (4153812385).

20404031135 is an equidigital number, since it uses as much as digits as its factorization.

20404031135 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9538.

The product of its (nonzero) digits is 1440, while the sum is 23.

Adding to 20404031135 its reverse (53113040402), we get a palindrome (73517071537).

The spelling of 20404031135 in words is "twenty billion, four hundred four million, thirty-one thousand, one hundred thirty-five".