22816993 has 2 divisors, whose sum is σ = 22816994. Its totient is φ = 22816992.

The previous prime is 22816987. The next prime is 22817021. The reversal of 22816993 is 39961822.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 21095649 + 1721344 = 4593^2 + 1312^2 .

It is a cyclic number.

It is not a de Polignac number, because 22816993 - 2⁹ = 22816481 is a prime.

It is not a weakly prime, because it can be changed into another prime (22816933) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11408496 + 11408497.

It is an arithmetic number, because the mean of its divisors is an integer number (11408497).

Almost surely, 2^22816993 is an apocalyptic number.

It is an amenable number.

22816993 is a deficient number, since it is larger than the sum of its proper divisors (1).

22816993 is an equidigital number, since it uses as much as digits as its factorization.

22816993 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 46656, while the sum is 40.

The square root of 22816993 is about 4776.7136192156. The cubic root of 22816993 is about 283.6304167256.

The spelling of 22816993 in words is "twenty-two million, eight hundred sixteen thousand, nine hundred ninety-three".