20660752 has 90 divisors (see below), whose sum is σ = 49818798. Its totient is φ = 8273664.

The previous prime is 20660749. The next prime is 20660753. The reversal of 20660752 is 25706602.

It can be written as a sum of positive squares in only one way, i.e., 18113536 + 2547216 = 4256^2 + 1596^2 .

It is a Harshad number since it is a multiple of its sum of digits (28).

It is a self number, because there is not a number n which added to its sum of digits gives 20660752.

It is not an unprimeable number, because it can be changed into a prime (20660753) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 282988 + ... + 283060.

Almost surely, 2^20660752 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 20660752, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (24909399).

20660752 is an abundant number, since it is smaller than the sum of its proper divisors (29158046).

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

20660752 is a wasteful number, since it uses less digits than its factorization.

20660752 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 133 (or 101 counting only the distinct ones).

The product of its (nonzero) digits is 5040, while the sum is 28.

The square root of 20660752 is about 4545.4099925089. The cubic root of 20660752 is about 274.3986949820.

It can be divided in two parts, 20660 and 752, that added together give a palindrome (21412).

The spelling of 20660752 in words is "twenty million, six hundred sixty thousand, seven hundred fifty-two".