20436113 has 2 divisors, whose sum is σ = 20436114. Its totient is φ = 20436112.

The previous prime is 20436109. The next prime is 20436133. The reversal of 20436113 is 31163402.

It is an a-pointer prime, because the next prime (20436133) can be obtained adding 20436113 to its sum of digits (20).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 19254544 + 1181569 = 4388^2 + 1087^2 .

It is a cyclic number.

It is not a de Polignac number, because 20436113 - 2² = 20436109 is a prime.

It is not a weakly prime, because it can be changed into another prime (20436103) 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, 10218056 + 10218057.

It is an arithmetic number, because the mean of its divisors is an integer number (10218057).

Almost surely, 2^20436113 is an apocalyptic number.

It is an amenable number.

20436113 is a deficient number, since it is larger than the sum of its proper divisors (1).

20436113 is an equidigital number, since it uses as much as digits as its factorization.

20436113 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 432, while the sum is 20.

The square root of 20436113 is about 4520.6319248530. The cubic root of 20436113 is about 273.4005801559.

Adding to 20436113 its reverse (31163402), we get a palindrome (51599515).

The spelling of 20436113 in words is "twenty million, four hundred thirty-six thousand, one hundred thirteen".