21544893093 has 8 divisors (see below), whose sum is σ = 28748275456. Its totient is φ = 14352386400.

The previous prime is 21544893047. The next prime is 21544893119. The reversal of 21544893093 is 39039844512.

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

It is not a de Polignac number, because 21544893093 - 2⁹ = 21544892581 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21544893593) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2714293 + ... + 2722218.

It is an arithmetic number, because the mean of its divisors is an integer number (3593534432).

Almost surely, 2^21544893093 is an apocalyptic number.

It is an amenable number.

21544893093 is a deficient number, since it is larger than the sum of its proper divisors (7203382363).

21544893093 is a wasteful number, since it uses less digits than its factorization.

21544893093 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5437835.

The product of its (nonzero) digits is 933120, while the sum is 48.

The spelling of 21544893093 in words is "twenty-one billion, five hundred forty-four million, eight hundred ninety-three thousand, ninety-three".