20020130321 has 4 divisors (see below), whose sum is σ = 20022992052. Its totient is φ = 20017268592.

The previous prime is 20020130303. The next prime is 20020130371. The reversal of 20020130321 is 12303102002.

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 17788890625 + 2231239696 = 133375^2 + 47236^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20020130321 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20020130296 and 20020130305.

It is not an unprimeable number, because it can be changed into a prime (20020130371) 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, 1420346 + ... + 1434371.

It is an arithmetic number, because the mean of its divisors is an integer number (5005748013).

Almost surely, 2^20020130321 is an apocalyptic number.

It is an amenable number.

20020130321 is a deficient number, since it is larger than the sum of its proper divisors (2861731).

20020130321 is an equidigital number, since it uses as much as digits as its factorization.

20020130321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2861730.

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

Adding to 20020130321 its reverse (12303102002), we get a palindrome (32323232323).

The spelling of 20020130321 in words is "twenty billion, twenty million, one hundred thirty thousand, three hundred twenty-one".