20436133 has 2 divisors, whose sum is σ = 20436134. Its totient is φ = 20436132.

The previous prime is 20436113. The next prime is 20436151. The reversal of 20436133 is 33163402.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 11573604 + 8862529 = 3402^2 + 2977^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20436133 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20436103) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10218066 + 10218067.

It is an arithmetic number, because the mean of its divisors is an integer number (10218067).

Almost surely, 2^20436133 is an apocalyptic number.

It is an amenable number.

20436133 is a deficient number, since it is larger than the sum of its proper divisors (1).

20436133 is an equidigital number, since it uses as much as digits as its factorization.

20436133 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1296, while the sum is 22.

The square root of 20436133 is about 4520.6341369326. The cubic root of 20436133 is about 273.4006693446.

Adding to 20436133 its reverse (33163402), we get a palindrome (53599535).

The spelling of 20436133 in words is "twenty million, four hundred thirty-six thousand, one hundred thirty-three".