22194692217 has 12 divisors (see below), whose sum is σ = 32120540244. Its totient is φ = 14768058240.

The previous prime is 22194692213. The next prime is 22194692231. The reversal of 22194692217 is 71229649122.

It can be written as a sum of positive squares in 2 ways, for example, as 9583626816 + 12611065401 = 97896^2 + 112299^2 .

It is not a de Polignac number, because 22194692217 - 2² = 22194692213 is a prime.

It is not an unprimeable number, because it can be changed into a prime (22194692213) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2361988 + ... + 2371365.

It is an arithmetic number, because the mean of its divisors is an integer number (2676711687).

Almost surely, 2^22194692217 is an apocalyptic number.

It is an amenable number.

22194692217 is a deficient number, since it is larger than the sum of its proper divisors (9925848027).

22194692217 is a wasteful number, since it uses less digits than its factorization.

22194692217 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4733880 (or 4733877 counting only the distinct ones).

The product of its digits is 217728, while the sum is 45.

The spelling of 22194692217 in words is "twenty-two billion, one hundred ninety-four million, six hundred ninety-two thousand, two hundred seventeen".