21944060905605 has 8 divisors (see below), whose sum is σ = 35110497448992. Its totient is φ = 11703499149648.

The previous prime is 21944060905579. The next prime is 21944060905607. The reversal of 21944060905605 is 50650906044912.

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

It is not a de Polignac number, because 21944060905605 - 2¹⁵ = 21944060872837 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21944060905607) 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, 731468696839 + ... + 731468696868.

It is an arithmetic number, because the mean of its divisors is an integer number (4388812181124).

Almost surely, 2^{21944060905605} is an apocalyptic number.

It is an amenable number.

21944060905605 is a deficient number, since it is larger than the sum of its proper divisors (13166436543387).

21944060905605 is a wasteful number, since it uses less digits than its factorization.

21944060905605 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1462937393715.

The product of its (nonzero) digits is 2332800, while the sum is 51.

The spelling of 21944060905605 in words is "twenty-one trillion, nine hundred forty-four billion, sixty million, nine hundred five thousand, six hundred five".