21094841085 has 16 divisors (see below), whose sum is σ = 35737142976. Its totient is φ = 10588782848.

The previous prime is 21094841083. The next prime is 21094841093. The reversal of 21094841085 is 58014849012.

It is a cyclic number.

It is not a de Polignac number, because 21094841085 - 2¹ = 21094841083 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21094841083) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 41362179 + ... + 41362688.

It is an arithmetic number, because the mean of its divisors is an integer number (2233571436).

Almost surely, 2^21094841085 is an apocalyptic number.

It is an amenable number.

21094841085 is a deficient number, since it is larger than the sum of its proper divisors (14642301891).

21094841085 is a wasteful number, since it uses less digits than its factorization.

21094841085 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 82724892.

The product of its (nonzero) digits is 92160, while the sum is 42.

The spelling of 21094841085 in words is "twenty-one billion, ninety-four million, eight hundred forty-one thousand, eighty-five".