22746821 has 2 divisors, whose sum is σ = 22746822. Its totient is φ = 22746820.

The previous prime is 22746811. The next prime is 22746853. The reversal of 22746821 is 12864722.

It is an a-pointer prime, because the next prime (22746853) can be obtained adding 22746821 to its sum of digits (32).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 14737921 + 8008900 = 3839^2 + 2830^2 .

It is a cyclic number.

It is not a de Polignac number, because 22746821 - 2¹⁰ = 22745797 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (22746811) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11373410 + 11373411.

It is an arithmetic number, because the mean of its divisors is an integer number (11373411).

Almost surely, 2^22746821 is an apocalyptic number.

It is an amenable number.

22746821 is a deficient number, since it is larger than the sum of its proper divisors (1).

22746821 is an equidigital number, since it uses as much as digits as its factorization.

22746821 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 10752, while the sum is 32.

The square root of 22746821 is about 4769.3627456926. The cubic root of 22746821 is about 283.3393565809.

The spelling of 22746821 in words is "twenty-two million, seven hundred forty-six thousand, eight hundred twenty-one".