20600443 has 4 divisors (see below), whose sum is σ = 20623968. Its totient is φ = 20576920.

The previous prime is 20600431. The next prime is 20600449. The reversal of 20600443 is 34400602.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20600443 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 20600443.

It is not an unprimeable number, because it can be changed into a prime (20600449) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10396 + ... + 12217.

It is an arithmetic number, because the mean of its divisors is an integer number (5155992).

Almost surely, 2^20600443 is an apocalyptic number.

20600443 is a deficient number, since it is larger than the sum of its proper divisors (23525).

20600443 is an equidigital number, since it uses as much as digits as its factorization.

20600443 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23524.

The product of its (nonzero) digits is 576, while the sum is 19.

The square root of 20600443 is about 4538.7710891826. The cubic root of 20600443 is about 274.1314436734.

The spelling of 20600443 in words is "twenty million, six hundred thousand, four hundred forty-three".