20544121 has 8 divisors (see below), whose sum is σ = 22166144. Its totient is φ = 18928080.

The previous prime is 20544119. The next prime is 20544169. The reversal of 20544121 is 12144502.

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 20544121 - 2¹ = 20544119 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20544101) 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, 7840 + ... + 10126.

It is an arithmetic number, because the mean of its divisors is an integer number (2770768).

Almost surely, 2^20544121 is an apocalyptic number.

It is an amenable number.

20544121 is a deficient number, since it is larger than the sum of its proper divisors (1622023).

20544121 is a wasteful number, since it uses less digits than its factorization.

20544121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2991.

The product of its (nonzero) digits is 320, while the sum is 19.

The square root of 20544121 is about 4532.5622996270. The cubic root of 20544121 is about 273.8813888028.

Adding to 20544121 its reverse (12144502), we get a palindrome (32688623).

The spelling of 20544121 in words is "twenty million, five hundred forty-four thousand, one hundred twenty-one".