20444115 has 16 divisors (see below), whose sum is σ = 34635168. Its totient is φ = 10262016.

The previous prime is 20444113. The next prime is 20444147. The reversal of 20444115 is 51144402.

It is a happy number.

It is not a de Polignac number, because 20444115 - 2¹ = 20444113 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 20444091 and 20444100.

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 15 ways as a sum of consecutive naturals, for example, 39832 + ... + 40341.

It is an arithmetic number, because the mean of its divisors is an integer number (2164698).

Almost surely, 2^20444115 is an apocalyptic number.

20444115 is a deficient number, since it is larger than the sum of its proper divisors (14191053).

20444115 is a wasteful number, since it uses less digits than its factorization.

20444115 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 80198.

The product of its (nonzero) digits is 640, while the sum is 21.

The square root of 20444115 is about 4521.5168914867. The cubic root of 20444115 is about 273.4362599019.

Adding to 20444115 its reverse (51144402), we get a palindrome (71588517).

The spelling of 20444115 in words is "twenty million, four hundred forty-four thousand, one hundred fifteen".