20659884059 has 4 divisors (see below), whose sum is σ = 20678821800. Its totient is φ = 20640946320.

The previous prime is 20659884053. The next prime is 20659884071. The reversal of 20659884059 is 95048895602.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 20659884059 - 2⁴ = 20659884043 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20659883995 and 20659884013.

It is not an unprimeable number, because it can be changed into a prime (20659884053) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9467234 + ... + 9469415.

It is an arithmetic number, because the mean of its divisors is an integer number (5169705450).

Almost surely, 2^20659884059 is an apocalyptic number.

20659884059 is a deficient number, since it is larger than the sum of its proper divisors (18937741).

20659884059 is a wasteful number, since it uses less digits than its factorization.

20659884059 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18937740.

The product of its (nonzero) digits is 6220800, while the sum is 56.

The spelling of 20659884059 in words is "twenty billion, six hundred fifty-nine million, eight hundred eighty-four thousand, fifty-nine".