22394721847 has 2 divisors, whose sum is σ = 22394721848. Its totient is φ = 22394721846.

The previous prime is 22394721829. The next prime is 22394721871. The reversal of 22394721847 is 74812749322.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-22394721847 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 22394721847.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (22394721647) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11197360923 + 11197360924.

It is an arithmetic number, because the mean of its divisors is an integer number (11197360924).

Almost surely, 2^22394721847 is an apocalyptic number.

22394721847 is a deficient number, since it is larger than the sum of its proper divisors (1).

22394721847 is an equidigital number, since it uses as much as digits as its factorization.

22394721847 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1354752, while the sum is 49.

The spelling of 22394721847 in words is "twenty-two billion, three hundred ninety-four million, seven hundred twenty-one thousand, eight hundred forty-seven".