20320134021 has 24 divisors (see below), whose sum is σ = 32141393856. Its totient is φ = 12268391040.

The previous prime is 20320133989. The next prime is 20320134031. The reversal of 20320134021 is 12043102302.

20320134021 is a `hidden beast` number, since 2 + 0 + 320 + 1 + 340 + 2 + 1 = 666.

It is not a de Polignac number, because 20320134021 - 2⁵ = 20320133989 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 20320133985 and 20320134003.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20320134031) by changing a digit.

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 23 ways as a sum of consecutive naturals, for example, 364180 + ... + 416253.

It is an arithmetic number, because the mean of its divisors is an integer number (1339224744).

Almost surely, 2^20320134021 is an apocalyptic number.

It is an amenable number.

20320134021 is a deficient number, since it is larger than the sum of its proper divisors (11821259835).

20320134021 is a wasteful number, since it uses less digits than its factorization.

20320134021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 780713 (or 780710 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 18.

Adding to 20320134021 its reverse (12043102302), we get a palindrome (32363236323).

The spelling of 20320134021 in words is "twenty billion, three hundred twenty million, one hundred thirty-four thousand, twenty-one".