22857844447 has 2 divisors, whose sum is σ = 22857844448. Its totient is φ = 22857844446.

The previous prime is 22857844439. The next prime is 22857844459. The reversal of 22857844447 is 74444875822.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 22857844447 - 2³ = 22857844439 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (22857844147) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11428922223 + 11428922224.

It is an arithmetic number, because the mean of its divisors is an integer number (11428922224).

Almost surely, 2^22857844447 is an apocalyptic number.

22857844447 is a deficient number, since it is larger than the sum of its proper divisors (1).

22857844447 is an equidigital number, since it uses as much as digits as its factorization.

22857844447 is an evil number, because the sum of its binary digits is even.

The product of its digits is 16056320, while the sum is 55.

The spelling of 22857844447 in words is "twenty-two billion, eight hundred fifty-seven million, eight hundred forty-four thousand, four hundred forty-seven".