20544943 has 4 divisors (see below), whose sum is σ = 20554408. Its totient is φ = 20535480.

The previous prime is 20544929. The next prime is 20544949. The reversal of 20544943 is 34944502.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 20544943 - 2¹³ = 20536751 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20544949) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 328 + ... + 6418.

It is an arithmetic number, because the mean of its divisors is an integer number (5138602).

Almost surely, 2^20544943 is an apocalyptic number.

20544943 is a deficient number, since it is larger than the sum of its proper divisors (9465).

20544943 is an equidigital number, since it uses as much as digits as its factorization.

20544943 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9464.

The product of its (nonzero) digits is 17280, while the sum is 31.

The square root of 20544943 is about 4532.6529759072. The cubic root of 20544943 is about 273.8850415509.

The spelling of 20544943 in words is "twenty million, five hundred forty-four thousand, nine hundred forty-three".