22009917912 has 32 divisors (see below), whose sum is σ = 56799790080. Its totient is φ = 7099973280.

The previous prime is 22009917893. The next prime is 22009917913. The reversal of 22009917912 is 21971990022.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22009917913) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 14790868 + ... + 14792355.

It is an arithmetic number, because the mean of its divisors is an integer number (1774993440).

Almost surely, 2^22009917912 is an apocalyptic number.

It is an amenable number.

22009917912 is an abundant number, since it is smaller than the sum of its proper divisors (34789872168).

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

22009917912 is a wasteful number, since it uses less digits than its factorization.

22009917912 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29583263 (or 29583259 counting only the distinct ones).

The product of its (nonzero) digits is 40824, while the sum is 42.

The spelling of 22009917912 in words is "twenty-two billion, nine million, nine hundred seventeen thousand, nine hundred twelve".