21093594394 has 8 divisors (see below), whose sum is σ = 31647021120. Its totient is φ = 10544587356.

The previous prime is 21093594383. The next prime is 21093594413. The reversal of 21093594394 is 49349539012.

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

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1092964 + ... + 1112095.

It is an arithmetic number, because the mean of its divisors is an integer number (3955877640).

Almost surely, 2^21093594394 is an apocalyptic number.

21093594394 is a deficient number, since it is larger than the sum of its proper divisors (10553426726).

21093594394 is a wasteful number, since it uses less digits than its factorization.

21093594394 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2209844.

The product of its (nonzero) digits is 1049760, while the sum is 49.

The spelling of 21093594394 in words is "twenty-one billion, ninety-three million, five hundred ninety-four thousand, three hundred ninety-four".