20544285 has 8 divisors (see below), whose sum is σ = 32870880. Its totient is φ = 10956944.

The previous prime is 20544283. The next prime is 20544299. The reversal of 20544285 is 58244502.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 20544285 - 2¹ = 20544283 is a prime.

It is a super-2 number, since 2×20544285² = 844135292322450, which contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20544283) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 684795 + ... + 684824.

It is an arithmetic number, because the mean of its divisors is an integer number (4108860).

Almost surely, 2^20544285 is an apocalyptic number.

It is an amenable number.

20544285 is a deficient number, since it is larger than the sum of its proper divisors (12326595).

20544285 is a wasteful number, since it uses less digits than its factorization.

20544285 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1369627.

The product of its (nonzero) digits is 12800, while the sum is 30.

The square root of 20544285 is about 4532.5803909032. The cubic root of 20544285 is about 273.8821175827.

Adding to 20544285 its reverse (58244502), we get a palindrome (78788787).

The spelling of 20544285 in words is "twenty million, five hundred forty-four thousand, two hundred eighty-five".