20593443 has 32 divisors (see below), whose sum is σ = 31752000. Its totient is φ = 11759616.

The previous prime is 20593427. The next prime is 20593453. The reversal of 20593443 is 34439502.

It is a Cunningham number, because it is equal to 4538²-1.

It is not a de Polignac number, because 20593443 - 2⁴ = 20593427 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 20593443.

It is not an unprimeable number, because it can be changed into a prime (20593403) 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 in 31 ways as a sum of consecutive naturals, for example, 58833 + ... + 59181.

It is an arithmetic number, because the mean of its divisors is an integer number (992250).

Almost surely, 2^20593443 is an apocalyptic number.

20593443 is a deficient number, since it is larger than the sum of its proper divisors (11158557).

20593443 is a wasteful number, since it uses less digits than its factorization.

20593443 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 471.

The product of its (nonzero) digits is 12960, while the sum is 30.

The square root of 20593443 is about 4537.9998898193. Note that the first 3 decimals coincide. The cubic root of 20593443 is about 274.1003903364.

The spelling of 20593443 in words is "twenty million, five hundred ninety-three thousand, four hundred forty-three".