20544768 has 108 divisors (see below), whose sum is σ = 61089028. Its totient is φ = 6635520.

The previous prime is 20544763. The next prime is 20544779. The reversal of 20544768 is 86744502.

20544768 is a `hidden beast` number, since 205 + 447 + 6 + 8 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 17040384 + 3504384 = 4128^2 + 1872^2 .

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20544763) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 85128 + ... + 85368.

Almost surely, 2^20544768 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 20544768, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (30544514).

20544768 is an abundant number, since it is smaller than the sum of its proper divisors (40544260).

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

20544768 is a wasteful number, since it uses less digits than its factorization.

20544768 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 300 (or 283 counting only the distinct ones).

The product of its (nonzero) digits is 53760, while the sum is 36.

The square root of 20544768 is about 4532.6336714983. The cubic root of 20544768 is about 273.8842639059.

It can be divided in two parts, 20544 and 768, that added together give a palindrome (21312).

The spelling of 20544768 in words is "twenty million, five hundred forty-four thousand, seven hundred sixty-eight".