20290133 has 2 divisors, whose sum is σ = 20290134. Its totient is φ = 20290132.

The previous prime is 20290099. The next prime is 20290139. The reversal of 20290133 is 33109202.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 19909444 + 380689 = 4462^2 + 617^2 .

It is a cyclic number.

It is not a de Polignac number, because 20290133 - 2⁸ = 20289877 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20290139) 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, 10145066 + 10145067.

It is an arithmetic number, because the mean of its divisors is an integer number (10145067).

Almost surely, 2^20290133 is an apocalyptic number.

It is an amenable number.

20290133 is a deficient number, since it is larger than the sum of its proper divisors (1).

20290133 is an equidigital number, since it uses as much as digits as its factorization.

20290133 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 20.

The square root of 20290133 is about 4504.4570150019. The cubic root of 20290133 is about 272.7480355338.

Adding to 20290133 its reverse (33109202), we get a palindrome (53399335).

The spelling of 20290133 in words is "twenty million, two hundred ninety thousand, one hundred thirty-three".