21944444286 has 32 divisors (see below), whose sum is σ = 44542649088. Its totient is φ = 7206631040.

The previous prime is 21944444267. The next prime is 21944444297. The reversal of 21944444286 is 68244444912.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 16321 + ... + 210131.

It is an arithmetic number, because the mean of its divisors is an integer number (1391957784).

Almost surely, 2^21944444286 is an apocalyptic number.

21944444286 is an abundant number, since it is smaller than the sum of its proper divisors (22598204802).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21944444286 is a wasteful number, since it uses less digits than its factorization.

21944444286 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 194096.

The product of its digits is 1769472, while the sum is 48.

The spelling of 21944444286 in words is "twenty-one billion, nine hundred forty-four million, four hundred forty-four thousand, two hundred eighty-six".