22606813 has 2 divisors, whose sum is σ = 22606814. Its totient is φ = 22606812.

The previous prime is 22606811. The next prime is 22606841. The reversal of 22606813 is 31860622.

It is an a-pointer prime, because the next prime (22606841) can be obtained adding 22606813 to its sum of digits (28).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 19377604 + 3229209 = 4402^2 + 1797^2 .

It is a cyclic number.

It is not a de Polignac number, because 22606813 - 2¹ = 22606811 is a prime.

It is a super-2 number, since 2×22606813² = 1022135988033938, which contains 22 as substring.

Together with 22606811, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (22606811) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11303406 + 11303407.

It is an arithmetic number, because the mean of its divisors is an integer number (11303407).

Almost surely, 2^22606813 is an apocalyptic number.

It is an amenable number.

22606813 is a deficient number, since it is larger than the sum of its proper divisors (1).

22606813 is an equidigital number, since it uses as much as digits as its factorization.

22606813 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3456, while the sum is 28.

The square root of 22606813 is about 4754.6622382668. The cubic root of 22606813 is about 282.7568364122.

The spelling of 22606813 in words is "twenty-two million, six hundred six thousand, eight hundred thirteen".