20043559 has 2 divisors, whose sum is σ = 20043560. Its totient is φ = 20043558.

The previous prime is 20043469. The next prime is 20043571. The reversal of 20043559 is 95534002.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 20043559 - 2¹⁹ = 19519271 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20043599) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10021779 + 10021780.

It is an arithmetic number, because the mean of its divisors is an integer number (10021780).

Almost surely, 2^20043559 is an apocalyptic number.

20043559 is a deficient number, since it is larger than the sum of its proper divisors (1).

20043559 is an equidigital number, since it uses as much as digits as its factorization.

20043559 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5400, while the sum is 28.

The square root of 20043559 is about 4477.0033504566. The cubic root of 20043559 is about 271.6386809634.

It can be divided in two parts, 20043 and 559, that added together give a palindrome (20602).

The spelling of 20043559 in words is "twenty million, forty-three thousand, five hundred fifty-nine".