21595104159 has 8 divisors (see below), whose sum is σ = 28885465392. Its totient is φ = 14350739520.

The previous prime is 21595104149. The next prime is 21595104173. The reversal of 21595104159 is 95140159512.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 21595104159 - 2¹⁶ = 21595038623 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 21595104159.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21595104109) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11498052 + ... + 11499929.

It is an arithmetic number, because the mean of its divisors is an integer number (3610683174).

Almost surely, 2^21595104159 is an apocalyptic number.

21595104159 is a deficient number, since it is larger than the sum of its proper divisors (7290361233).

21595104159 is a wasteful number, since it uses less digits than its factorization.

21595104159 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22998297.

The product of its (nonzero) digits is 81000, while the sum is 42.

The spelling of 21595104159 in words is "twenty-one billion, five hundred ninety-five million, one hundred four thousand, one hundred fifty-nine".