22156012 has 12 divisors (see below), whose sum is σ = 38820600. Its totient is φ = 11064416.

The previous prime is 22156009. The next prime is 22156019. The reversal of 22156012 is 21065122.

It is not an unprimeable number, because it can be changed into a prime (22156019) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 864 + ... + 6712.

It is an arithmetic number, because the mean of its divisors is an integer number (3235050).

Almost surely, 2^22156012 is an apocalyptic number.

It is an amenable number.

22156012 is a deficient number, since it is larger than the sum of its proper divisors (16664588).

22156012 is a wasteful number, since it uses less digits than its factorization.

22156012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6800 (or 6798 counting only the distinct ones).

The product of its (nonzero) digits is 240, while the sum is 19.

The square root of 22156012 is about 4707.0173146059. The cubic root of 22156012 is about 280.8647246787.

The spelling of 22156012 in words is "twenty-two million, one hundred fifty-six thousand, twelve".