20659884043 has 2 divisors, whose sum is σ = 20659884044. Its totient is φ = 20659884042.

The previous prime is 20659884041. The next prime is 20659884053. The reversal of 20659884043 is 34048895602.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 20659884043 - 2¹ = 20659884041 is a prime.

Together with 20659884041, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (20659884041) 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 as a sum of consecutive naturals, namely, 10329942021 + 10329942022.

It is an arithmetic number, because the mean of its divisors is an integer number (10329942022).

Almost surely, 2^20659884043 is an apocalyptic number.

20659884043 is a deficient number, since it is larger than the sum of its proper divisors (1).

20659884043 is an equidigital number, since it uses as much as digits as its factorization.

20659884043 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1658880, while the sum is 49.

The spelling of 20659884043 in words is "twenty billion, six hundred fifty-nine million, eight hundred eighty-four thousand, forty-three".