21944444107 has 2 divisors, whose sum is σ = 21944444108. Its totient is φ = 21944444106.

The previous prime is 21944444099. The next prime is 21944444153. The reversal of 21944444107 is 70144444912.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 21944444107 - 2³ = 21944444099 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 21944444107.

It is not a weakly prime, because it can be changed into another prime (21944444167) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10972222053 + 10972222054.

It is an arithmetic number, because the mean of its divisors is an integer number (10972222054).

Almost surely, 2^21944444107 is an apocalyptic number.

21944444107 is a deficient number, since it is larger than the sum of its proper divisors (1).

21944444107 is an equidigital number, since it uses as much as digits as its factorization.

21944444107 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 129024, while the sum is 40.

The spelling of 21944444107 in words is "twenty-one billion, nine hundred forty-four million, four hundred forty-four thousand, one hundred seven".