22128705947 has 2 divisors, whose sum is σ = 22128705948. Its totient is φ = 22128705946.

The previous prime is 22128705941. The next prime is 22128705961. The reversal of 22128705947 is 74950782122.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 22128705947 - 2²⁴ = 22111928731 is a prime.

It is not a weakly prime, because it can be changed into another prime (22128705941) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11064352973 + 11064352974.

It is an arithmetic number, because the mean of its divisors is an integer number (11064352974).

Almost surely, 2^22128705947 is an apocalyptic number.

22128705947 is a deficient number, since it is larger than the sum of its proper divisors (1).

22128705947 is an equidigital number, since it uses as much as digits as its factorization.

22128705947 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 564480, while the sum is 47.

The spelling of 22128705947 in words is "twenty-two billion, one hundred twenty-eight million, seven hundred five thousand, nine hundred forty-seven".