20208313 has 2 divisors, whose sum is σ = 20208314. Its totient is φ = 20208312.

The previous prime is 20208299. The next prime is 20208319. The reversal of 20208313 is 31380202.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 12766329 + 7441984 = 3573^2 + 2728^2 .

It is a cyclic number.

It is not a de Polignac number, because 20208313 - 2⁹ = 20207801 is a prime.

It is not a weakly prime, because it can be changed into another prime (20208319) 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, 10104156 + 10104157.

It is an arithmetic number, because the mean of its divisors is an integer number (10104157).

Almost surely, 2^20208313 is an apocalyptic number.

It is an amenable number.

20208313 is a deficient number, since it is larger than the sum of its proper divisors (1).

20208313 is an equidigital number, since it uses as much as digits as its factorization.

20208313 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 19.

The square root of 20208313 is about 4495.3657248326. The cubic root of 20208313 is about 272.3809226384.

Adding to 20208313 its reverse (31380202), we get a palindrome (51588515).

The spelling of 20208313 in words is "twenty million, two hundred eight thousand, three hundred thirteen".