20320033213 has 2 divisors, whose sum is σ = 20320033214. Its totient is φ = 20320033212.

The previous prime is 20320033199. The next prime is 20320033231. The reversal of 20320033213 is 31233002302.

It is a happy number.

Together with next prime (20320033231) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 11061359929 + 9258673284 = 105173^2 + 96222^2 .

It is a cyclic number.

It is not a de Polignac number, because 20320033213 - 2²¹ = 20317936061 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20320033243) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10160016606 + 10160016607.

It is an arithmetic number, because the mean of its divisors is an integer number (10160016607).

Almost surely, 2^20320033213 is an apocalyptic number.

It is an amenable number.

20320033213 is a deficient number, since it is larger than the sum of its proper divisors (1).

20320033213 is an equidigital number, since it uses as much as digits as its factorization.

20320033213 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 648, while the sum is 19.

Adding to 20320033213 its reverse (31233002302), we get a palindrome (51553035515).

The spelling of 20320033213 in words is "twenty billion, three hundred twenty million, thirty-three thousand, two hundred thirteen".