22005870 has 32 divisors (see below), whose sum is σ = 53941248. Its totient is φ = 5743008.

The previous prime is 22005859. The next prime is 22005911. The reversal of 22005870 is 7850022.

It is a self number, because there is not a number n which added to its sum of digits gives 22005870.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6394 + ... + 9213.

It is an arithmetic number, because the mean of its divisors is an integer number (1685664).

Almost surely, 2^22005870 is an apocalyptic number.

22005870 is an abundant number, since it is smaller than the sum of its proper divisors (31935378).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

22005870 is a wasteful number, since it uses less digits than its factorization.

22005870 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15664.

The product of its (nonzero) digits is 1120, while the sum is 24.

The square root of 22005870 is about 4691.0414621915. The cubic root of 22005870 is about 280.2288520174.

Adding to 22005870 its reverse (7850022), we get a palindrome (29855892).

The spelling of 22005870 in words is "twenty-two million, five thousand, eight hundred seventy".