20710144 has 108 divisors (see below), whose sum is σ = 52195584. Its totient is φ = 8128512.

The previous prime is 20710141. The next prime is 20710159. The reversal of 20710144 is 44101702.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20710141) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 163009 + ... + 163135.

Almost surely, 2^20710144 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20710144, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (26097792).

20710144 is an abundant number, since it is smaller than the sum of its proper divisors (31485440).

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

20710144 is a wasteful number, since it uses less digits than its factorization.

20710144 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 170 (or 149 counting only the distinct ones).

The product of its (nonzero) digits is 224, while the sum is 19.

The square root of 20710144 is about 4550.8399224758. The cubic root of 20710144 is about 274.6171819400.

Adding to 20710144 its reverse (44101702), we get a palindrome (64811846).

The spelling of 20710144 in words is "twenty million, seven hundred ten thousand, one hundred forty-four".