21794094521 has 8 divisors (see below), whose sum is σ = 23296339584. Its totient is φ = 20338072480.

The previous prime is 21794094431. The next prime is 21794094527. The reversal of 21794094521 is 12549049712.

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

It is a cyclic number.

It is not a de Polignac number, because 21794094521 - 2³⁴ = 4614225337 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21794094527) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11554781 + ... + 11556666.

It is an arithmetic number, because the mean of its divisors is an integer number (2912042448).

Almost surely, 2^21794094521 is an apocalyptic number.

It is an amenable number.

21794094521 is a deficient number, since it is larger than the sum of its proper divisors (1502245063).

21794094521 is a wasteful number, since it uses less digits than its factorization.

21794094521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23111511.

The product of its (nonzero) digits is 181440, while the sum is 44.

The spelling of 21794094521 in words is "twenty-one billion, seven hundred ninety-four million, ninety-four thousand, five hundred twenty-one".