22193390645 has 8 divisors (see below), whose sum is σ = 26635381080. Its totient is φ = 17752504320.

The previous prime is 22193390627. The next prime is 22193390677. The reversal of 22193390645 is 54609339122.

It can be written as a sum of positive squares in 4 ways, for example, as 1880870161 + 20312520484 = 43369^2 + 142522^2 .

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

It is not a de Polignac number, because 22193390645 - 2⁶ = 22193390581 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 22193390596 and 22193390605.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 231140 + ... + 312749.

It is an arithmetic number, because the mean of its divisors is an integer number (3329422635).

Almost surely, 2^22193390645 is an apocalyptic number.

It is an amenable number.

22193390645 is a deficient number, since it is larger than the sum of its proper divisors (4441990435).

22193390645 is an equidigital number, since it uses as much as digits as its factorization.

22193390645 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 552055.

The product of its (nonzero) digits is 349920, while the sum is 44.

The spelling of 22193390645 in words is "twenty-two billion, one hundred ninety-three million, three hundred ninety thousand, six hundred forty-five".