20530443 has 8 divisors (see below), whose sum is σ = 27398800. Its totient is φ = 13674528.

The previous prime is 20530427. The next prime is 20530453. The reversal of 20530443 is 34403502.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 20530443 - 2⁴ = 20530427 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20530423) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1893 + ... + 6681.

It is an arithmetic number, because the mean of its divisors is an integer number (3424850).

Almost surely, 2^20530443 is an apocalyptic number.

20530443 is a deficient number, since it is larger than the sum of its proper divisors (6868357).

20530443 is a wasteful number, since it uses less digits than its factorization.

20530443 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6221.

The product of its (nonzero) digits is 1440, while the sum is 21.

The square root of 20530443 is about 4531.0531888293. The cubic root of 20530443 is about 273.8205931243.

Adding to 20530443 its reverse (34403502), we get a palindrome (54933945).

The spelling of 20530443 in words is "twenty million, five hundred thirty thousand, four hundred forty-three".