22985813 has 2 divisors, whose sum is σ = 22985814. Its totient is φ = 22985812.

The previous prime is 22985749. The next prime is 22985821. The reversal of 22985813 is 31858922.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 20729809 + 2256004 = 4553^2 + 1502^2 .

It is a cyclic number.

It is not a de Polignac number, because 22985813 - 2⁶ = 22985749 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (22985863) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11492906 + 11492907.

It is an arithmetic number, because the mean of its divisors is an integer number (11492907).

Almost surely, 2^22985813 is an apocalyptic number.

It is an amenable number.

22985813 is a deficient number, since it is larger than the sum of its proper divisors (1).

22985813 is an equidigital number, since it uses as much as digits as its factorization.

22985813 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 34560, while the sum is 38.

The square root of 22985813 is about 4794.3521981598. The cubic root of 22985813 is about 284.3282135806.

The spelling of 22985813 in words is "twenty-two million, nine hundred eighty-five thousand, eight hundred thirteen".