20968858085 has 16 divisors (see below), whose sum is σ = 28773968256. Its totient is φ = 14370307008.

The previous prime is 20968858073. The next prime is 20968858093. The reversal of 20968858085 is 58085886902.

It is a cyclic number.

It is not a de Polignac number, because 20968858085 - 2¹⁰ = 20968857061 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 112199 + ... + 233508.

It is an arithmetic number, because the mean of its divisors is an integer number (1798373016).

Almost surely, 2^20968858085 is an apocalyptic number.

It is an amenable number.

20968858085 is a deficient number, since it is larger than the sum of its proper divisors (7805110171).

20968858085 is a wasteful number, since it uses less digits than its factorization.

20968858085 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 347452.

The product of its (nonzero) digits is 11059200, while the sum is 59.

The spelling of 20968858085 in words is "twenty billion, nine hundred sixty-eight million, eight hundred fifty-eight thousand, eighty-five".