21395895395 has 16 divisors (see below), whose sum is σ = 29554049280. Its totient is φ = 14565917664.

The previous prime is 21395895379. The next prime is 21395895407. The reversal of 21395895395 is 59359859312.

It is a cyclic number.

It is not a de Polignac number, because 21395895395 - 2⁴ = 21395895379 is a prime.

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, 2194097 + ... + 2203826.

It is an arithmetic number, because the mean of its divisors is an integer number (1847128080).

Almost surely, 2^21395895395 is an apocalyptic number.

21395895395 is a deficient number, since it is larger than the sum of its proper divisors (8158153885).

21395895395 is a wasteful number, since it uses less digits than its factorization.

21395895395 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4398074.

The product of its digits is 13122000, while the sum is 59.

The spelling of 21395895395 in words is "twenty-one billion, three hundred ninety-five million, eight hundred ninety-five thousand, three hundred ninety-five".