21775160894 has 16 divisors (see below), whose sum is σ = 33549510528. Its totient is φ = 10592060832.

The previous prime is 21775160873. The next prime is 21775160909. The reversal of 21775160894 is 49806157712.

It is a happy number.

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, 1025267 + ... + 1046289.

It is an arithmetic number, because the mean of its divisors is an integer number (2096844408).

Almost surely, 2^21775160894 is an apocalyptic number.

21775160894 is a deficient number, since it is larger than the sum of its proper divisors (11774349634).

21775160894 is a wasteful number, since it uses less digits than its factorization.

21775160894 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35059.

The product of its (nonzero) digits is 846720, while the sum is 50.

The spelling of 21775160894 in words is "twenty-one billion, seven hundred seventy-five million, one hundred sixty thousand, eight hundred ninety-four".