20103313 has 2 divisors, whose sum is σ = 20103314. Its totient is φ = 20103312.

The previous prime is 20103301. The next prime is 20103319. The reversal of 20103313 is 31330102.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 17740944 + 2362369 = 4212^2 + 1537^2 .

It is a cyclic number.

It is not a de Polignac number, because 20103313 - 2¹³ = 20095121 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 20103293 and 20103302.

It is not a weakly prime, because it can be changed into another prime (20103319) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10051656 + 10051657.

It is an arithmetic number, because the mean of its divisors is an integer number (10051657).

Almost surely, 2^20103313 is an apocalyptic number.

It is an amenable number.

20103313 is a deficient number, since it is larger than the sum of its proper divisors (1).

20103313 is an equidigital number, since it uses as much as digits as its factorization.

20103313 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 54, while the sum is 13.

The square root of 20103313 is about 4483.6718211751. The cubic root of 20103313 is about 271.9083502137.

Adding to 20103313 its reverse (31330102), we get a palindrome (51433415).

The spelling of 20103313 in words is "twenty million, one hundred three thousand, three hundred thirteen".