21822681008 has 10 divisors (see below), whose sum is σ = 42281444484. Its totient is φ = 10911340496.

The previous prime is 21822680969. The next prime is 21822681011. The reversal of 21822681008 is 80018622812.

It is an unprimeable number.

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, 681958766 + ... + 681958797.

Almost surely, 2^21822681008 is an apocalyptic number.

It is an amenable number.

21822681008 is a deficient number, since it is larger than the sum of its proper divisors (20458763476).

21822681008 is a wasteful number, since it uses less digits than its factorization.

21822681008 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1363917571 (or 1363917565 counting only the distinct ones).

The product of its (nonzero) digits is 24576, while the sum is 38.

The spelling of 21822681008 in words is "twenty-one billion, eight hundred twenty-two million, six hundred eighty-one thousand, eight".