20020307 has 2 divisors, whose sum is σ = 20020308. Its totient is φ = 20020306.

The previous prime is 20020303. The next prime is 20020331. The reversal of 20020307 is 70302002.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 20020307 - 2² = 20020303 is a prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 20020291 and 20020300.

It is not a weakly prime, because it can be changed into another prime (20020303) 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, 10010153 + 10010154.

It is an arithmetic number, because the mean of its divisors is an integer number (10010154).

Almost surely, 2^20020307 is an apocalyptic number.

20020307 is a deficient number, since it is larger than the sum of its proper divisors (1).

20020307 is an equidigital number, since it uses as much as digits as its factorization.

20020307 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 84, while the sum is 14.

The square root of 20020307 is about 4474.4057706024. The cubic root of 20020307 is about 271.5336000480.

Adding to 20020307 its reverse (70302002), we get a palindrome (90322309).

The spelling of 20020307 in words is "twenty million, twenty thousand, three hundred seven".