20003205135 has 16 divisors (see below), whose sum is σ = 32053563360. Its totient is φ = 10652231040.

The previous prime is 20003205127. The next prime is 20003205137. The reversal of 20003205135 is 53150230002.

It is not a de Polignac number, because 20003205135 - 2³ = 20003205127 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20003205137) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 998820 + ... + 1018649.

It is an arithmetic number, because the mean of its divisors is an integer number (2003347710).

Almost surely, 2^20003205135 is an apocalyptic number.

20003205135 is a deficient number, since it is larger than the sum of its proper divisors (12050358225).

20003205135 is a wasteful number, since it uses less digits than its factorization.

20003205135 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2018138.

The product of its (nonzero) digits is 900, while the sum is 21.

Adding to 20003205135 its reverse (53150230002), we get a palindrome (73153435137).

The spelling of 20003205135 in words is "twenty billion, three million, two hundred five thousand, one hundred thirty-five".