20868845085 has 48 divisors (see below), whose sum is σ = 39810408768. Its totient is φ = 10028659200.

The previous prime is 20868845071. The next prime is 20868845113. The reversal of 20868845085 is 58054886802.

It is a happy number.

It is not a de Polignac number, because 20868845085 - 2⁶ = 20868845021 is a prime.

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 47 ways as a sum of consecutive naturals, for example, 130611 + ... + 242480.

It is an arithmetic number, because the mean of its divisors is an integer number (829383516).

Almost surely, 2^20868845085 is an apocalyptic number.

It is an amenable number.

20868845085 is a deficient number, since it is larger than the sum of its proper divisors (18941563683).

20868845085 is a wasteful number, since it uses less digits than its factorization.

20868845085 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 373226 (or 373223 counting only the distinct ones).

The product of its (nonzero) digits is 4915200, while the sum is 54.

The spelling of 20868845085 in words is "twenty billion, eight hundred sixty-eight million, eight hundred forty-five thousand, eighty-five".