20443135 has 8 divisors (see below), whose sum is σ = 24695136. Its totient is φ = 16245600.

The previous prime is 20443123. The next prime is 20443141. The reversal of 20443135 is 53134402.

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

It is not a de Polignac number, because 20443135 - 2¹⁷ = 20312063 is a prime.

It is a Duffinian number.

It is a plaindrome in base 16.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12784 + ... + 14293.

It is an arithmetic number, because the mean of its divisors is an integer number (3086892).

Almost surely, 2^20443135 is an apocalyptic number.

20443135 is a deficient number, since it is larger than the sum of its proper divisors (4252001).

20443135 is a wasteful number, since it uses less digits than its factorization.

20443135 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27233.

The product of its (nonzero) digits is 1440, while the sum is 22.

The square root of 20443135 is about 4521.4085194771. The cubic root of 20443135 is about 273.4318907257.

Adding to 20443135 its reverse (53134402), we get a palindrome (73577537).

The spelling of 20443135 in words is "twenty million, four hundred forty-three thousand, one hundred thirty-five".