22209812 has 24 divisors (see below), whose sum is σ = 41125056. Its totient is φ = 10473408.

The previous prime is 22209797. The next prime is 22209821. The reversal of 22209812 is 21890222.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5063 + ... + 8369.

It is an arithmetic number, because the mean of its divisors is an integer number (1713544).

Almost surely, 2^22209812 is an apocalyptic number.

It is an amenable number.

22209812 is a deficient number, since it is larger than the sum of its proper divisors (18915244).

22209812 is a wasteful number, since it uses less digits than its factorization.

22209812 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3407 (or 3405 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 26.

The square root of 22209812 is about 4712.7287212400. The cubic root of 22209812 is about 281.0918760877.

The spelling of 22209812 in words is "twenty-two million, two hundred nine thousand, eight hundred twelve".