20436413 has 2 divisors, whose sum is σ = 20436414. Its totient is φ = 20436412.

The previous prime is 20436401. The next prime is 20436433. The reversal of 20436413 is 31463402.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 20403289 + 33124 = 4517^2 + 182^2 .

It is a cyclic number.

It is not a de Polignac number, because 20436413 - 2¹⁶ = 20370877 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20436433) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10218206 + 10218207.

It is an arithmetic number, because the mean of its divisors is an integer number (10218207).

Almost surely, 2^20436413 is an apocalyptic number.

It is an amenable number.

20436413 is a deficient number, since it is larger than the sum of its proper divisors (1).

20436413 is an equidigital number, since it uses as much as digits as its factorization.

20436413 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1728, while the sum is 23.

The square root of 20436413 is about 4520.6651059330. The cubic root of 20436413 is about 273.4019179800.

Adding to 20436413 its reverse (31463402), we get a palindrome (51899815).

The spelling of 20436413 in words is "twenty million, four hundred thirty-six thousand, four hundred thirteen".