220020443 has 4 divisors (see below), whose sum is σ = 232962840. Its totient is φ = 207078048.

The previous prime is 220020433. The next prime is 220020457. The reversal of 220020443 is 344020022.

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

It is a cyclic number.

It is not a de Polignac number, because 220020443 - 2¹⁰ = 220019419 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (17), and also a Moran number because the ratio is a prime number: 12942379 = 220020443 / (2 + 2 + 0 + 0 + 2 + 0 + 4 + 4 + 3).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (220020433) 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, 6471173 + ... + 6471206.

It is an arithmetic number, because the mean of its divisors is an integer number (58240710).

Almost surely, 2^220020443 is an apocalyptic number.

220020443 is a deficient number, since it is larger than the sum of its proper divisors (12942397).

220020443 is a wasteful number, since it uses less digits than its factorization.

220020443 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12942396.

The product of its (nonzero) digits is 384, while the sum is 17.

The square root of 220020443 is about 14833.0860915724. The cubic root of 220020443 is about 603.6997716645.

Adding to 220020443 its reverse (344020022), we get a palindrome (564040465).

The spelling of 220020443 in words is "two hundred twenty million, twenty thousand, four hundred forty-three".