21895961168 has 40 divisors (see below), whose sum is σ = 44019015936. Its totient is φ = 10539878400.

The previous prime is 21895961069. The next prime is 21895961177. The reversal of 21895961168 is 86116959812.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 18638 + ... + 210093.

Almost surely, 2^21895961168 is an apocalyptic number.

It is an amenable number.

21895961168 is an abundant number, since it is smaller than the sum of its proper divisors (22123054768).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21895961168 is a wasteful number, since it uses less digits than its factorization.

21895961168 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 228963 (or 228957 counting only the distinct ones).

The product of its digits is 1866240, while the sum is 56.

The spelling of 21895961168 in words is "twenty-one billion, eight hundred ninety-five million, nine hundred sixty-one thousand, one hundred sixty-eight".