20244559 has 2 divisors, whose sum is σ = 20244560. Its totient is φ = 20244558.

The previous prime is 20244551. The next prime is 20244583. The reversal of 20244559 is 95544202.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 20244559 - 2³ = 20244551 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 20244559.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20244551) 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 as a sum of consecutive naturals, namely, 10122279 + 10122280.

It is an arithmetic number, because the mean of its divisors is an integer number (10122280).

Almost surely, 2^20244559 is an apocalyptic number.

20244559 is a deficient number, since it is larger than the sum of its proper divisors (1).

20244559 is an equidigital number, since it uses as much as digits as its factorization.

20244559 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 14400, while the sum is 31.

The square root of 20244559 is about 4499.3954038293. The cubic root of 20244559 is about 272.5436745081.

The spelling of 20244559 in words is "twenty million, two hundred forty-four thousand, five hundred fifty-nine".