20853908895 has 8 divisors (see below), whose sum is σ = 33366254256. Its totient is φ = 11122084736.

The previous prime is 20853908863. The next prime is 20853908921. The reversal of 20853908895 is 59880935802.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 20853908895 - 2⁵ = 20853908863 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 (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 695130282 + ... + 695130311.

It is an arithmetic number, because the mean of its divisors is an integer number (4170781782).

Almost surely, 2^20853908895 is an apocalyptic number.

20853908895 is a deficient number, since it is larger than the sum of its proper divisors (12512345361).

20853908895 is a wasteful number, since it uses less digits than its factorization.

20853908895 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1390260601.

The product of its (nonzero) digits is 6220800, while the sum is 57.

The spelling of 20853908895 in words is "twenty billion, eight hundred fifty-three million, nine hundred eight thousand, eight hundred ninety-five".