20420033 has 2 divisors, whose sum is σ = 20420034. Its totient is φ = 20420032.

The previous prime is 20420027. The next prime is 20420051. The reversal of 20420033 is 33002402.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 20322064 + 97969 = 4508^2 + 313^2 .

It is a cyclic number.

It is not a de Polignac number, because 20420033 - 2¹⁶ = 20354497 is a prime.

It is not a weakly prime, because it can be changed into another prime (20420053) 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, 10210016 + 10210017.

It is an arithmetic number, because the mean of its divisors is an integer number (10210017).

Almost surely, 2^20420033 is an apocalyptic number.

It is an amenable number.

20420033 is a deficient number, since it is larger than the sum of its proper divisors (1).

20420033 is an equidigital number, since it uses as much as digits as its factorization.

20420033 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 144, while the sum is 14.

The square root of 20420033 is about 4518.8530624485. The cubic root of 20420033 is about 273.3288536182.

Adding to 20420033 its reverse (33002402), we get a palindrome (53422435).

The spelling of 20420033 in words is "twenty million, four hundred twenty thousand, thirty-three".