21943358105 has 8 divisors (see below), whose sum is σ = 26334390600. Its totient is φ = 17553112576.

The previous prime is 21943358009. The next prime is 21943358111. The reversal of 21943358105 is 50185334912.

It can be written as a sum of positive squares in 4 ways, for example, as 612463504 + 21330894601 = 24748^2 + 146051^2 .

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 21943358105 - 2¹² = 21943354009 is a prime.

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, 133550 + ... + 248439.

It is an arithmetic number, because the mean of its divisors is an integer number (3291798825).

Almost surely, 2^21943358105 is an apocalyptic number.

It is an amenable number.

21943358105 is a deficient number, since it is larger than the sum of its proper divisors (4391032495).

21943358105 is a wasteful number, since it uses less digits than its factorization.

21943358105 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 393483.

The product of its (nonzero) digits is 129600, while the sum is 41.

The spelling of 21943358105 in words is "twenty-one billion, nine hundred forty-three million, three hundred fifty-eight thousand, one hundred five".