20544143 has 12 divisors (see below), whose sum is σ = 22170312. Its totient is φ = 19029120.

The previous prime is 20544119. The next prime is 20544169. The reversal of 20544143 is 34144502.

It is not a de Polignac number, because 20544143 - 2⁶ = 20544079 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20544113) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 18833 + ... + 19893.

It is an arithmetic number, because the mean of its divisors is an integer number (1847526).

Almost surely, 2^20544143 is an apocalyptic number.

20544143 is a deficient number, since it is larger than the sum of its proper divisors (1626169).

20544143 is a wasteful number, since it uses less digits than its factorization.

20544143 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1162 (or 1145 counting only the distinct ones).

The product of its (nonzero) digits is 1920, while the sum is 23.

The square root of 20544143 is about 4532.5647265097. The cubic root of 20544143 is about 273.8814865661.

Adding to 20544143 its reverse (34144502), we get a palindrome (54688645).

The spelling of 20544143 in words is "twenty million, five hundred forty-four thousand, one hundred forty-three".