22194973 has 4 divisors (see below), whose sum is σ = 22217980. Its totient is φ = 22171968.

The previous prime is 22194961. The next prime is 22194989. The reversal of 22194973 is 37949122.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 37949122 = 2 ⋅18974561.

It can be written as a sum of positive squares in 2 ways, for example, as 10614564 + 11580409 = 3258^2 + 3403^2 .

It is a cyclic number.

It is not a de Polignac number, because 22194973 - 2⁵ = 22194941 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22194943) 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, 9990 + ... + 12007.

It is an arithmetic number, because the mean of its divisors is an integer number (5554495).

Almost surely, 2^22194973 is an apocalyptic number.

It is an amenable number.

22194973 is a deficient number, since it is larger than the sum of its proper divisors (23007).

22194973 is a wasteful number, since it uses less digits than its factorization.

22194973 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23006.

The product of its digits is 27216, while the sum is 37.

The square root of 22194973 is about 4711.1541048877. The cubic root of 22194973 is about 281.0292603447.

The spelling of 22194973 in words is "twenty-two million, one hundred ninety-four thousand, nine hundred seventy-three".