20563272 has 48 divisors (see below), whose sum is σ = 56335500. Its totient is φ = 6775296.

The previous prime is 20563259. The next prime is 20563307. The reversal of 20563272 is 27236502.

20563272 is a `hidden beast` number, since 20 + 5 + 632 + 7 + 2 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 20196036 + 367236 = 4494^2 + 606^2 .

It is an unprimeable number.

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, 4804 + ... + 8012.

Almost surely, 2^20563272 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 20563272, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (28167750).

20563272 is an abundant number, since it is smaller than the sum of its proper divisors (35772228).

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

20563272 is a wasteful number, since it uses less digits than its factorization.

20563272 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3310 (or 3303 counting only the distinct ones).

The product of its (nonzero) digits is 5040, while the sum is 27.

The square root of 20563272 is about 4534.6744094808. The cubic root of 20563272 is about 273.9664654290.

Adding to 20563272 its reverse (27236502), we get a palindrome (47799774).

The spelling of 20563272 in words is "twenty million, five hundred sixty-three thousand, two hundred seventy-two".