22091644 has 6 divisors (see below), whose sum is σ = 38660384. Its totient is φ = 11045820.

The previous prime is 22091621. The next prime is 22091647. The reversal of 22091644 is 44619022.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22091647) 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 as a sum of consecutive naturals, namely, 2761452 + ... + 2761459.

Almost surely, 2^22091644 is an apocalyptic number.

It is an amenable number.

22091644 is a deficient number, since it is larger than the sum of its proper divisors (16568740).

22091644 is a wasteful number, since it uses less digits than its factorization.

22091644 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5522915 (or 5522913 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 28.

The square root of 22091644 is about 4700.1748903631. The cubic root of 22091644 is about 280.5924699604.

The spelling of 22091644 in words is "twenty-two million, ninety-one thousand, six hundred forty-four".