21105505622 has 8 divisors (see below), whose sum is σ = 32679492672. Its totient is φ = 10212341400.

The previous prime is 21105505609. The next prime is 21105505637. The reversal of 21105505622 is 22650550112.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 170205629 + ... + 170205752.

It is an arithmetic number, because the mean of its divisors is an integer number (4084936584).

Almost surely, 2^21105505622 is an apocalyptic number.

21105505622 is a deficient number, since it is larger than the sum of its proper divisors (11573987050).

21105505622 is a wasteful number, since it uses less digits than its factorization.

21105505622 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 340411414.

The product of its (nonzero) digits is 6000, while the sum is 29.

The spelling of 21105505622 in words is "twenty-one billion, one hundred five million, five hundred five thousand, six hundred twenty-two".