20855831353 has 32 divisors (see below), whose sum is σ = 25696569600. Its totient is φ = 16519409664.

The previous prime is 20855831323. The next prime is 20855831363. The reversal of 20855831353 is 35313855802.

It is a cyclic number.

It is not a de Polignac number, because 20855831353 - 2¹³ = 20855823161 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20855831323) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 8627601 + ... + 8630017.

It is an arithmetic number, because the mean of its divisors is an integer number (803017800).

Almost surely, 2^20855831353 is an apocalyptic number.

It is an amenable number.

20855831353 is a deficient number, since it is larger than the sum of its proper divisors (4840738247).

20855831353 is a wasteful number, since it uses less digits than its factorization.

20855831353 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3729.

The product of its (nonzero) digits is 432000, while the sum is 43.

The spelling of 20855831353 in words is "twenty billion, eight hundred fifty-five million, eight hundred thirty-one thousand, three hundred fifty-three".