20017044 has 30 divisors (see below), whose sum is σ = 52329354. Its totient is φ = 6672240.

The previous prime is 20017043. The next prime is 20017091. The reversal of 20017044 is 44071002.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 11088900 + 8928144 = 3330^2 + 2988^2 .

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20017043) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 30567 + ... + 31214.

Almost surely, 2^20017044 is an apocalyptic number.

It is an amenable number.

20017044 is an abundant number, since it is smaller than the sum of its proper divisors (32312310).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20017044 is a wasteful number, since it uses less digits than its factorization.

20017044 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 61797 (or 61786 counting only the distinct ones).

The product of its (nonzero) digits is 224, while the sum is 18.

The square root of 20017044 is about 4474.0411263197. The cubic root of 20017044 is about 271.5188473226.

Adding to 20017044 its reverse (44071002), we get a palindrome (64088046).

It can be divided in two parts, 2001 and 7044, that added together give a triangular number (9045 = T₁₃₄).

The spelling of 20017044 in words is "twenty million, seventeen thousand, forty-four".