20850656771 has 8 divisors (see below), whose sum is σ = 23851747584. Its totient is φ = 17855172360.

The previous prime is 20850656759. The next prime is 20850656797. The reversal of 20850656771 is 17765605802.

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 20850656771 - 2¹⁸ = 20850394627 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20850656711) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1393625 + ... + 1408506.

It is an arithmetic number, because the mean of its divisors is an integer number (2981468448).

Almost surely, 2^20850656771 is an apocalyptic number.

20850656771 is a deficient number, since it is larger than the sum of its proper divisors (3001090813).

20850656771 is a wasteful number, since it uses less digits than its factorization.

20850656771 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2803201.

The product of its (nonzero) digits is 705600, while the sum is 47.

The spelling of 20850656771 in words is "twenty billion, eight hundred fifty million, six hundred fifty-six thousand, seven hundred seventy-one".