21946422588347 has 2 divisors, whose sum is σ = 21946422588348. Its totient is φ = 21946422588346.

The previous prime is 21946422588289. The next prime is 21946422588427. The reversal of 21946422588347 is 74388522464912.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 21946422588347 - 2²⁶ = 21946355479483 is a prime.

It is not a weakly prime, because it can be changed into another prime (21946422588547) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10973211294173 + 10973211294174.

It is an arithmetic number, because the mean of its divisors is an integer number (10973211294174).

Almost surely, 2^{21946422588347} is an apocalyptic number.

21946422588347 is a deficient number, since it is larger than the sum of its proper divisors (1).

21946422588347 is an equidigital number, since it uses as much as digits as its factorization.

21946422588347 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 185794560, while the sum is 65.

The spelling of 21946422588347 in words is "twenty-one trillion, nine hundred forty-six billion, four hundred twenty-two million, five hundred eighty-eight thousand, three hundred forty-seven".