20436433 has 2 divisors, whose sum is σ = 20436434. Its totient is φ = 20436432.

The previous prime is 20436413. The next prime is 20436461. The reversal of 20436433 is 33463402.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 16875664 + 3560769 = 4108^2 + 1887^2 .

It is a cyclic number.

It is not a de Polignac number, because 20436433 - 2⁵ = 20436401 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 20436398 and 20436407.

It is not a weakly prime, because it can be changed into another prime (20436413) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10218216 + 10218217.

It is an arithmetic number, because the mean of its divisors is an integer number (10218217).

Almost surely, 2^20436433 is an apocalyptic number.

It is an amenable number.

20436433 is a deficient number, since it is larger than the sum of its proper divisors (1).

20436433 is an equidigital number, since it uses as much as digits as its factorization.

20436433 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5184, while the sum is 25.

The square root of 20436433 is about 4520.6673179963. The cubic root of 20436433 is about 273.4020071678.

Adding to 20436433 its reverse (33463402), we get a palindrome (53899835).

The spelling of 20436433 in words is "twenty million, four hundred thirty-six thousand, four hundred thirty-three".