20859000057 has 48 divisors (see below), whose sum is σ = 34801303680. Its totient is φ = 11792583936.

The previous prime is 20859000047. The next prime is 20859000079. The reversal of 20859000057 is 75000095802.

It is not a de Polignac number, because 20859000057 - 2⁷ = 20858999929 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 20858999985 and 20859000030.

It is not an unprimeable number, because it can be changed into a prime (20859000047) by changing a digit.

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, 5677173 + ... + 5680845.

It is an arithmetic number, because the mean of its divisors is an integer number (725027160).

Almost surely, 2^20859000057 is an apocalyptic number.

It is an amenable number.

20859000057 is a deficient number, since it is larger than the sum of its proper divisors (13942303623).

20859000057 is a wasteful number, since it uses less digits than its factorization.

20859000057 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4622 (or 4619 counting only the distinct ones).

The product of its (nonzero) digits is 25200, while the sum is 36.

Adding to 20859000057 its reverse (75000095802), we get a palindrome (95859095859).

The spelling of 20859000057 in words is "twenty billion, eight hundred fifty-nine million, fifty-seven", and thus it is an aban number.