22191794 has 8 divisors (see below), whose sum is σ = 33661980. Its totient is φ = 10971136.

The previous prime is 22191779. The next prime is 22191797. The reversal of 22191794 is 49719122.

It can be written as a sum of positive squares in 2 ways, for example, as 21279769 + 912025 = 4613^2 + 955^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (22191797) 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 in 3 ways as a sum of consecutive naturals, for example, 62159 + ... + 62514.

Almost surely, 2^22191794 is an apocalyptic number.

22191794 is a deficient number, since it is larger than the sum of its proper divisors (11470186).

22191794 is a wasteful number, since it uses less digits than its factorization.

22191794 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 124764.

The product of its digits is 9072, while the sum is 35.

The square root of 22191794 is about 4710.8167020168. The cubic root of 22191794 is about 281.0158423712.

The spelling of 22191794 in words is "twenty-two million, one hundred ninety-one thousand, seven hundred ninety-four".