20659884071 has 2 divisors, whose sum is σ = 20659884072. Its totient is φ = 20659884070.

The previous prime is 20659884053. The next prime is 20659884101. The reversal of 20659884071 is 17048895602.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20659884071 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20659884031) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10329942035 + 10329942036.

It is an arithmetic number, because the mean of its divisors is an integer number (10329942036).

Almost surely, 2^20659884071 is an apocalyptic number.

20659884071 is a deficient number, since it is larger than the sum of its proper divisors (1).

20659884071 is an equidigital number, since it uses as much as digits as its factorization.

20659884071 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 967680, while the sum is 50.

The spelling of 20659884071 in words is "twenty billion, six hundred fifty-nine million, eight hundred eighty-four thousand, seventy-one".