20031320213 has 2 divisors, whose sum is σ = 20031320214. Its totient is φ = 20031320212.

The previous prime is 20031320107. The next prime is 20031320219. The reversal of 20031320213 is 31202313002.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 10550987524 + 9480332689 = 102718^2 + 97367^2 .

It is a cyclic number.

It is not a de Polignac number, because 20031320213 - 2²⁴ = 20014542997 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 20031320191 and 20031320200.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20031320219) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10015660106 + 10015660107.

It is an arithmetic number, because the mean of its divisors is an integer number (10015660107).

Almost surely, 2^20031320213 is an apocalyptic number.

It is an amenable number.

20031320213 is a deficient number, since it is larger than the sum of its proper divisors (1).

20031320213 is an equidigital number, since it uses as much as digits as its factorization.

20031320213 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 216, while the sum is 17.

Adding to 20031320213 its reverse (31202313002), we get a palindrome (51233633215).

The spelling of 20031320213 in words is "twenty billion, thirty-one million, three hundred twenty thousand, two hundred thirteen".