20544372 has 18 divisors (see below), whose sum is σ = 51931698. Its totient is φ = 6848112.

The previous prime is 20544343. The next prime is 20544389. The reversal of 20544372 is 27344502.

It can be written as a sum of positive squares in only one way, i.e., 20034576 + 509796 = 4476^2 + 714^2 .

It is a tau number, because it is divible by the number of its divisors (18).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 285303 + ... + 285374.

Almost surely, 2^20544372 is an apocalyptic number.

It is an amenable number.

20544372 is an abundant number, since it is smaller than the sum of its proper divisors (31387326).

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

20544372 is a wasteful number, since it uses less digits than its factorization.

20544372 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 570687 (or 570682 counting only the distinct ones).

The product of its (nonzero) digits is 6720, while the sum is 27.

The square root of 20544372 is about 4532.5899880753. The cubic root of 20544372 is about 273.8825041899.

Adding to 20544372 its reverse (27344502), we get a palindrome (47888874).

The spelling of 20544372 in words is "twenty million, five hundred forty-four thousand, three hundred seventy-two".