20717044 has 12 divisors (see below), whose sum is σ = 36328068. Its totient is φ = 10337600.

The previous prime is 20717041. The next prime is 20717057. The reversal of 20717044 is 44071702.

It can be written as a sum of positive squares in 2 ways, for example, as 1690000 + 19027044 = 1300^2 + 4362^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20717041) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2887 + ... + 7054.

It is an arithmetic number, because the mean of its divisors is an integer number (3027339).

Almost surely, 2^20717044 is an apocalyptic number.

It is an amenable number.

20717044 is a deficient number, since it is larger than the sum of its proper divisors (15611024).

20717044 is a wasteful number, since it uses less digits than its factorization.

20717044 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10466 (or 10464 counting only the distinct ones).

The product of its (nonzero) digits is 1568, while the sum is 25.

The square root of 20717044 is about 4551.5979611561. The cubic root of 20717044 is about 274.6476766282.

Adding to 20717044 its reverse (44071702), we get a palindrome (64788746).

The spelling of 20717044 in words is "twenty million, seven hundred seventeen thousand, forty-four".