21105833361 has 8 divisors (see below), whose sum is σ = 28187020800. Its totient is φ = 14047600752.

The previous prime is 21105833339. The next prime is 21105833369. The reversal of 21105833361 is 16333850112.

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

It is not a de Polignac number, because 21105833361 - 2⁹ = 21105832849 is a prime.

It is not an unprimeable number, because it can be changed into a prime (21105833369) 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, 5736561 + ... + 5740238.

It is an arithmetic number, because the mean of its divisors is an integer number (3523377600).

Almost surely, 2^21105833361 is an apocalyptic number.

It is an amenable number.

21105833361 is a deficient number, since it is larger than the sum of its proper divisors (7081187439).

21105833361 is a wasteful number, since it uses less digits than its factorization.

21105833361 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11477415.

The product of its (nonzero) digits is 12960, while the sum is 33.

The spelling of 21105833361 in words is "twenty-one billion, one hundred five million, eight hundred thirty-three thousand, three hundred sixty-one".