20350010321 has 4 divisors (see below), whose sum is σ = 20782989312. Its totient is φ = 19917031332.

The previous prime is 20350010309. The next prime is 20350010341. The reversal of 20350010321 is 12301005302.

20350010321 = 8354² + 8355² + ... + 8635².

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 a cyclic number.

It is not a de Polignac number, because 20350010321 - 2³⁰ = 19276268497 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 20350010321.

It is not an unprimeable number, because it can be changed into a prime (20350010341) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 216489425 + ... + 216489518.

It is an arithmetic number, because the mean of its divisors is an integer number (5195747328).

Almost surely, 2^20350010321 is an apocalyptic number.

It is an amenable number.

20350010321 is a deficient number, since it is larger than the sum of its proper divisors (432978991).

20350010321 is an equidigital number, since it uses as much as digits as its factorization.

20350010321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 432978990.

The product of its (nonzero) digits is 180, while the sum is 17.

Adding to 20350010321 its reverse (12301005302), we get a palindrome (32651015623).

The spelling of 20350010321 in words is "twenty billion, three hundred fifty million, ten thousand, three hundred twenty-one".