22806860821 has 2 divisors, whose sum is σ = 22806860822. Its totient is φ = 22806860820.

The previous prime is 22806860819. The next prime is 22806860831. The reversal of 22806860821 is 12806860822.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 14359228900 + 8447631921 = 119830^2 + 91911^2 .

It is a cyclic number.

It is not a de Polignac number, because 22806860821 - 2¹ = 22806860819 is a prime.

Together with 22806860819, 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 (22806860831) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11403430410 + 11403430411.

It is an arithmetic number, because the mean of its divisors is an integer number (11403430411).

Almost surely, 2^22806860821 is an apocalyptic number.

It is an amenable number.

22806860821 is a deficient number, since it is larger than the sum of its proper divisors (1).

22806860821 is an equidigital number, since it uses as much as digits as its factorization.

22806860821 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 147456, while the sum is 43.

Subtracting from 22806860821 its reverse (12806860822), we obtain a palindrome (9999999999).

The spelling of 22806860821 in words is "twenty-two billion, eight hundred six million, eight hundred sixty thousand, eight hundred twenty-one".