22194905 has 4 divisors (see below), whose sum is σ = 26633892. Its totient is φ = 17755920.

The previous prime is 22194883. The next prime is 22194917. The reversal of 22194905 is 50949122.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 3463321 + 18731584 = 1861^2 + 4328^2 .

It is not a de Polignac number, because 22194905 - 2²⁰ = 21146329 is a prime.

It is a super-2 number, since 2×22194905² = 985227615918050, which contains 22 as substring.

It is a Duffinian number.

It is an unprimeable number.

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, 2219486 + ... + 2219495.

It is an arithmetic number, because the mean of its divisors is an integer number (6658473).

Almost surely, 2^22194905 is an apocalyptic number.

It is an amenable number.

22194905 is a deficient number, since it is larger than the sum of its proper divisors (4438987).

22194905 is an equidigital number, since it uses as much as digits as its factorization.

22194905 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4438986.

The product of its (nonzero) digits is 6480, while the sum is 32.

The square root of 22194905 is about 4711.1468879669. The cubic root of 22194905 is about 281.0289733426.

The spelling of 22194905 in words is "twenty-two million, one hundred ninety-four thousand, nine hundred five".