22008905 has 8 divisors (see below), whose sum is σ = 27025152. Its totient is φ = 17197488.

The previous prime is 22008901. The next prime is 22008911. The reversal of 22008905 is 50980022.

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 22008905 - 2² = 22008901 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (22008901) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 50969 + ... + 51398.

It is an arithmetic number, because the mean of its divisors is an integer number (3378144).

Almost surely, 2^22008905 is an apocalyptic number.

It is an amenable number.

22008905 is a deficient number, since it is larger than the sum of its proper divisors (5016247).

22008905 is a wasteful number, since it uses less digits than its factorization.

22008905 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 102415.

The product of its (nonzero) digits is 1440, while the sum is 26.

The square root of 22008905 is about 4691.3649399722. The cubic root of 22008905 is about 280.2417342691.

Adding to 22008905 its reverse (50980022), we get a palindrome (72988927).

The spelling of 22008905 in words is "twenty-two million, eight thousand, nine hundred five".