21946622848 has 16 divisors (see below), whose sum is σ = 43721787960. Its totient is φ = 10973311360.

The previous prime is 21946622843. The next prime is 21946622851. The reversal of 21946622848 is 84822664912.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (16).

It is a super-4 number, since 4×21946622848⁴ (a number of 42 digits) contains 4444 as substring. Note that it is a super-d number also for d = 2.

It is a junction number, because it is equal to n+sod(n) for n = 21946622795 and 21946622804.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21946622843) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 85728868 + ... + 85729123.

Almost surely, 2^21946622848 is an apocalyptic number.

It is an amenable number.

21946622848 is a deficient number, since it is larger than the sum of its proper divisors (21775165112).

21946622848 is an equidigital number, since it uses as much as digits as its factorization.

21946622848 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 171458005 (or 171457993 counting only the distinct ones).

The product of its digits is 2654208, while the sum is 52.

The spelling of 21946622848 in words is "twenty-one billion, nine hundred forty-six million, six hundred twenty-two thousand, eight hundred forty-eight".