20444117 has 8 divisors (see below), whose sum is σ = 21154392. Its totient is φ = 19744000.

The previous prime is 20444113. The next prime is 20444147. The reversal of 20444117 is 71144402.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 2686321 + 17757796 = 1639^2 + 4214^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 20444117 - 2² = 20444113 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20444092 and 20444101.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20444111) 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, 1673 + ... + 6609.

It is an arithmetic number, because the mean of its divisors is an integer number (2644299).

Almost surely, 2^20444117 is an apocalyptic number.

It is an amenable number.

20444117 is a deficient number, since it is larger than the sum of its proper divisors (710275).

20444117 is a wasteful number, since it uses less digits than its factorization.

20444117 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5079.

The product of its (nonzero) digits is 896, while the sum is 23.

The square root of 20444117 is about 4521.5171126515. The cubic root of 20444117 is about 273.4362688184.

Adding to 20444117 its reverse (71144402), we get a palindrome (91588519).

It can be divided in two parts, 2044 and 4117, that multiplied together give a palindrome (8415148).

The spelling of 20444117 in words is "twenty million, four hundred forty-four thousand, one hundred seventeen".