22656813 has 4 divisors (see below), whose sum is σ = 30209088. Its totient is φ = 15104540.

The previous prime is 22656793. The next prime is 22656833. The reversal of 22656813 is 31865622.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is an interprime number because it is at equal distance from previous prime (22656793) and next prime (22656833).

It is a cyclic number.

It is not a de Polignac number, because 22656813 - 2⁹ = 22656301 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22656833) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3776133 + ... + 3776138.

It is an arithmetic number, because the mean of its divisors is an integer number (7552272).

Almost surely, 2^22656813 is an apocalyptic number.

It is an amenable number.

22656813 is a deficient number, since it is larger than the sum of its proper divisors (7552275).

22656813 is an equidigital number, since it uses as much as digits as its factorization.

22656813 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7552274.

The product of its digits is 17280, while the sum is 33.

The square root of 22656813 is about 4759.9173312149. The cubic root of 22656813 is about 282.9651428140.

The spelling of 22656813 in words is "twenty-two million, six hundred fifty-six thousand, eight hundred thirteen".