20630033 has 2 divisors, whose sum is σ = 20630034. Its totient is φ = 20630032.

The previous prime is 20630023. The next prime is 20630041. The reversal of 20630033 is 33003602.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 15737089 + 4892944 = 3967^2 + 2212^2 .

It is a cyclic number.

It is not a de Polignac number, because 20630033 - 2⁶ = 20629969 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 20629993 and 20630020.

It is not a weakly prime, because it can be changed into another prime (20630003) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10315016 + 10315017.

It is an arithmetic number, because the mean of its divisors is an integer number (10315017).

Almost surely, 2^20630033 is an apocalyptic number.

It is an amenable number.

20630033 is a deficient number, since it is larger than the sum of its proper divisors (1).

20630033 is an equidigital number, since it uses as much as digits as its factorization.

20630033 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 324, while the sum is 17.

The square root of 20630033 is about 4542.0296124090. The cubic root of 20630033 is about 274.2626329034.

Adding to 20630033 its reverse (33003602), we get a palindrome (53633635).

The spelling of 20630033 in words is "twenty million, six hundred thirty thousand, thirty-three".