20433443 has 2 divisors, whose sum is σ = 20433444. Its totient is φ = 20433442.

The previous prime is 20433437. The next prime is 20433463. The reversal of 20433443 is 34433402.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20433443 is a prime.

It is equal to p_1296320 and since 20433443 and 1296320 have the same sum of digits, it is a Honaker prime.

It is not a weakly prime, because it can be changed into another prime (20433403) 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, 10216721 + 10216722.

It is an arithmetic number, because the mean of its divisors is an integer number (10216722).

Almost surely, 2^20433443 is an apocalyptic number.

20433443 is a deficient number, since it is larger than the sum of its proper divisors (1).

20433443 is an equidigital number, since it uses as much as digits as its factorization.

20433443 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3456, while the sum is 23.

The square root of 20433443 is about 4520.3366025109. The cubic root of 20433443 is about 273.3886729447.

Adding to 20433443 its reverse (34433402), we get a palindrome (54866845).

The spelling of 20433443 in words is "twenty million, four hundred thirty-three thousand, four hundred forty-three".