20053500321 has 4 divisors (see below), whose sum is σ = 26738000432. Its totient is φ = 13369000212.

The previous prime is 20053500307. The next prime is 20053500359. The reversal of 20053500321 is 12300535002.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 20053500321 - 2¹¹ = 20053498273 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20053500221) 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 3 ways as a sum of consecutive naturals, for example, 3342250051 + ... + 3342250056.

It is an arithmetic number, because the mean of its divisors is an integer number (6684500108).

Almost surely, 2^20053500321 is an apocalyptic number.

It is an amenable number.

20053500321 is a deficient number, since it is larger than the sum of its proper divisors (6684500111).

20053500321 is an equidigital number, since it uses as much as digits as its factorization.

20053500321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6684500110.

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

The spelling of 20053500321 in words is "twenty billion, fifty-three million, five hundred thousand, three hundred twenty-one".