20443033 has 8 divisors (see below), whose sum is σ = 22264200. Its totient is φ = 18657408.

The previous prime is 20443019. The next prime is 20443037. The reversal of 20443033 is 33034402.

It can be written as a sum of positive squares in 4 ways, for example, as 345744 + 20097289 = 588^2 + 4483^2 .

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20443033 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 20443033.

It is not an unprimeable number, because it can be changed into a prime (20443037) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7678 + ... + 9991.

It is an arithmetic number, because the mean of its divisors is an integer number (2783025).

Almost surely, 2^20443033 is an apocalyptic number.

It is an amenable number.

20443033 is a deficient number, since it is larger than the sum of its proper divisors (1821167).

20443033 is a wasteful number, since it uses less digits than its factorization.

20443033 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17771.

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

The square root of 20443033 is about 4521.3972397921. The cubic root of 20443033 is about 273.4314359667.

Adding to 20443033 its reverse (33034402), we get a palindrome (53477435).

The spelling of 20443033 in words is "twenty million, four hundred forty-three thousand, thirty-three".