20033443 has 4 divisors (see below), whose sum is σ = 20049408. Its totient is φ = 20017480.

The previous prime is 20033441. The next prime is 20033459. The reversal of 20033443 is 34433002.

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 20033443 - 2¹ = 20033441 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 20033443.

It is not an unprimeable number, because it can be changed into a prime (20033441) 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, 5923 + ... + 8668.

It is an arithmetic number, because the mean of its divisors is an integer number (5012352).

Almost surely, 2^20033443 is an apocalyptic number.

20033443 is a deficient number, since it is larger than the sum of its proper divisors (15965).

20033443 is a wasteful number, since it uses less digits than its factorization.

20033443 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15964.

The product of its (nonzero) digits is 864, while the sum is 19.

The square root of 20033443 is about 4475.8734343142. The cubic root of 20033443 is about 271.5929745212.

Adding to 20033443 its reverse (34433002), we get a palindrome (54466445).

The spelling of 20033443 in words is "twenty million, thirty-three thousand, four hundred forty-three".