20906033 has 2 divisors, whose sum is σ = 20906034. Its totient is φ = 20906032.

The previous prime is 20905993. The next prime is 20906051. The reversal of 20906033 is 33060902.

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., 12794929 + 8111104 = 3577^2 + 2848^2 .

It is a cyclic number.

It is not a de Polignac number, because 20906033 - 2²² = 16711729 is a prime.

It is not a weakly prime, because it can be changed into another prime (20906233) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10453016 + 10453017.

It is an arithmetic number, because the mean of its divisors is an integer number (10453017).

Almost surely, 2^20906033 is an apocalyptic number.

It is an amenable number.

20906033 is a deficient number, since it is larger than the sum of its proper divisors (1).

20906033 is an equidigital number, since it uses as much as digits as its factorization.

20906033 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 972, while the sum is 23.

The square root of 20906033 is about 4572.3115598130. The cubic root of 20906033 is about 275.4802978435.

Adding to 20906033 its reverse (33060902), we get a palindrome (53966935).

The spelling of 20906033 in words is "twenty million, nine hundred six thousand, thirty-three".