20342213 has 2 divisors, whose sum is σ = 20342214. Its totient is φ = 20342212.

The previous prime is 20342209. The next prime is 20342243. The reversal of 20342213 is 31224302.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 18809569 + 1532644 = 4337^2 + 1238^2 .

It is a cyclic number.

It is not a de Polignac number, because 20342213 - 2² = 20342209 is a prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 20342191 and 20342200.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20342243) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10171106 + 10171107.

It is an arithmetic number, because the mean of its divisors is an integer number (10171107).

Almost surely, 2^20342213 is an apocalyptic number.

It is an amenable number.

20342213 is a deficient number, since it is larger than the sum of its proper divisors (1).

20342213 is an equidigital number, since it uses as much as digits as its factorization.

20342213 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 288, while the sum is 17.

The square root of 20342213 is about 4510.2342511227. The cubic root of 20342213 is about 272.9811961806.

Adding to 20342213 its reverse (31224302), we get a palindrome (51566515).

The spelling of 20342213 in words is "twenty million, three hundred forty-two thousand, two hundred thirteen".