22361999917 has 2 divisors, whose sum is σ = 22361999918. Its totient is φ = 22361999916.

The previous prime is 22361999911. The next prime is 22361999921. The reversal of 22361999917 is 71999916322.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 21794321641 + 567678276 = 147629^2 + 23826^2 .

It is a cyclic number.

It is not a de Polignac number, because 22361999917 - 2³ = 22361999909 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (22361999911) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11180999958 + 11180999959.

It is an arithmetic number, because the mean of its divisors is an integer number (11180999959).

Almost surely, 2^22361999917 is an apocalyptic number.

It is an amenable number.

22361999917 is a deficient number, since it is larger than the sum of its proper divisors (1).

22361999917 is an equidigital number, since it uses as much as digits as its factorization.

22361999917 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3306744, while the sum is 58.

The spelling of 22361999917 in words is "twenty-two billion, three hundred sixty-one million, nine hundred ninety-nine thousand, nine hundred seventeen".