20859903195 has 16 divisors (see below), whose sum is σ = 33706301472. Its totient is φ = 11015129600.

The previous prime is 20859903173. The next prime is 20859903257. The reversal of 20859903195 is 59130995802.

It is not a de Polignac number, because 20859903195 - 2⁷ = 20859903067 is a prime.

It is a super-2 number, since 2×20859903195² (a number of 21 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6882942 + ... + 6885971.

It is an arithmetic number, because the mean of its divisors is an integer number (2106643842).

Almost surely, 2^20859903195 is an apocalyptic number.

20859903195 is a deficient number, since it is larger than the sum of its proper divisors (12846398277).

20859903195 is a wasteful number, since it uses less digits than its factorization.

20859903195 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13769022.

The product of its (nonzero) digits is 874800, while the sum is 51.

The spelling of 20859903195 in words is "twenty billion, eight hundred fifty-nine million, nine hundred three thousand, one hundred ninety-five".