20321134205 has 16 divisors (see below), whose sum is σ = 24643272384. Its totient is φ = 16085848320.

The previous prime is 20321134193. The next prime is 20321134247. The reversal of 20321134205 is 50243112302.

It is not a de Polignac number, because 20321134205 - 2³⁴ = 3141265021 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

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, 130085 + ... + 239925.

It is an arithmetic number, because the mean of its divisors is an integer number (1540204524).

Almost surely, 2^20321134205 is an apocalyptic number.

It is an amenable number.

20321134205 is a deficient number, since it is larger than the sum of its proper divisors (4322138179).

20321134205 is a wasteful number, since it uses less digits than its factorization.

20321134205 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 110236.

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

Adding to 20321134205 its reverse (50243112302), we get a palindrome (70564246507).

The spelling of 20321134205 in words is "twenty billion, three hundred twenty-one million, one hundred thirty-four thousand, two hundred five".