20543244 has 12 divisors (see below), whose sum is σ = 47934264. Its totient is φ = 6847744.

The previous prime is 20543233. The next prime is 20543249. The reversal of 20543244 is 44234502.

It is a tau number, because it is divible by the number of its divisors (12).

It is not an unprimeable number, because it can be changed into a prime (20543249) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 855957 + ... + 855980.

It is an arithmetic number, because the mean of its divisors is an integer number (3994522).

Almost surely, 2^20543244 is an apocalyptic number.

It is an amenable number.

20543244 is an abundant number, since it is smaller than the sum of its proper divisors (27391020).

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

20543244 is a wasteful number, since it uses less digits than its factorization.

20543244 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1711944 (or 1711942 counting only the distinct ones).

The product of its (nonzero) digits is 3840, while the sum is 24.

The square root of 20543244 is about 4532.4655541990. The cubic root of 20543244 is about 273.8774915419.

Adding to 20543244 its reverse (44234502), we get a palindrome (64777746).

The spelling of 20543244 in words is "twenty million, five hundred forty-three thousand, two hundred forty-four".