20020213321 has 4 divisors (see below), whose sum is σ = 20022898372. Its totient is φ = 20017528272.

The previous prime is 20020213267. The next prime is 20020213331. The reversal of 20020213321 is 12331202002.

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 17374139721 + 2646073600 = 131811^2 + 51440^2 .

It is a cyclic number.

It is not a de Polignac number, because 20020213321 - 2⁷ = 20020213193 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20020213295 and 20020213304.

It is not an unprimeable number, because it can be changed into a prime (20020213331) 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, 1331310 + ... + 1346263.

It is an arithmetic number, because the mean of its divisors is an integer number (5005724593).

Almost surely, 2^20020213321 is an apocalyptic number.

It is an amenable number.

20020213321 is a deficient number, since it is larger than the sum of its proper divisors (2685051).

20020213321 is an equidigital number, since it uses as much as digits as its factorization.

20020213321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2685050.

The product of its (nonzero) digits is 144, while the sum is 16.

Adding to 20020213321 its reverse (12331202002), we get a palindrome (32351415323).

The spelling of 20020213321 in words is "twenty billion, twenty million, two hundred thirteen thousand, three hundred twenty-one".