20443105 has 8 divisors (see below), whose sum is σ = 25323264. Its totient is φ = 15826800.

The previous prime is 20443097. The next prime is 20443109. The reversal of 20443105 is 50134402.

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

It is not a de Polignac number, because 20443105 - 2³ = 20443097 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20443109) 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, 65791 + ... + 66100.

It is an arithmetic number, because the mean of its divisors is an integer number (3165408).

Almost surely, 2^20443105 is an apocalyptic number.

It is an amenable number.

20443105 is a deficient number, since it is larger than the sum of its proper divisors (4880159).

20443105 is a wasteful number, since it uses less digits than its factorization.

20443105 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 131927.

The product of its (nonzero) digits is 480, while the sum is 19.

The square root of 20443105 is about 4521.4052019256. The cubic root of 20443105 is about 273.4317569733.

Adding to 20443105 its reverse (50134402), we get a palindrome (70577507).

The spelling of 20443105 in words is "twenty million, four hundred forty-three thousand, one hundred five".