20310200321 has 4 divisors (see below), whose sum is σ = 20859124692. Its totient is φ = 19761275952.

The previous prime is 20310200293. The next prime is 20310200357. The reversal of 20310200321 is 12300201302.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 18833719696 + 1476480625 = 137236^2 + 38425^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20310200321 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20310200296 and 20310200305.

It is not an unprimeable number, because it can be changed into a prime (20310200221) 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, 274462130 + ... + 274462203.

It is an arithmetic number, because the mean of its divisors is an integer number (5214781173).

Almost surely, 2^20310200321 is an apocalyptic number.

It is an amenable number.

20310200321 is a deficient number, since it is larger than the sum of its proper divisors (548924371).

20310200321 is an equidigital number, since it uses as much as digits as its factorization.

20310200321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 548924370.

The product of its (nonzero) digits is 72, while the sum is 14.

Adding to 20310200321 its reverse (12300201302), we get a palindrome (32610401623).

The spelling of 20310200321 in words is "twenty billion, three hundred ten million, two hundred thousand, three hundred twenty-one".