22005985 has 8 divisors (see below), whose sum is σ = 26582976. Its totient is φ = 17487600.

The previous prime is 22005979. The next prime is 22005989. The reversal of 22005985 is 58950022.

It is a happy number.

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

It is not a de Polignac number, because 22005985 - 2¹³ = 21997793 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (22005989) 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, 13819 + ... + 15328.

It is an arithmetic number, because the mean of its divisors is an integer number (3322872).

Almost surely, 2^22005985 is an apocalyptic number.

It is an amenable number.

22005985 is a deficient number, since it is larger than the sum of its proper divisors (4576991).

22005985 is a wasteful number, since it uses less digits than its factorization.

22005985 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29303.

The product of its (nonzero) digits is 7200, while the sum is 31.

The square root of 22005985 is about 4691.0537195816. The cubic root of 22005985 is about 280.2293401638.

The spelling of 22005985 in words is "twenty-two million, five thousand, nine hundred eighty-five".