20906065895 has 16 divisors (see below), whose sum is σ = 29473168032. Its totient is φ = 14034840960.

The previous prime is 20906065853. The next prime is 20906065909. The reversal of 20906065895 is 59856060902.

It is not a de Polignac number, because 20906065895 - 2²⁰ = 20905017319 is a prime.

It is a congruent number.

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, 14618912 + ... + 14620341.

It is an arithmetic number, because the mean of its divisors is an integer number (1842073002).

Almost surely, 2^20906065895 is an apocalyptic number.

20906065895 is a deficient number, since it is larger than the sum of its proper divisors (8567102137).

20906065895 is a wasteful number, since it uses less digits than its factorization.

20906065895 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29239282.

The product of its (nonzero) digits is 1166400, while the sum is 50.

The spelling of 20906065895 in words is "twenty billion, nine hundred six million, sixty-five thousand, eight hundred ninety-five".