21941065448 has 16 divisors (see below), whose sum is σ = 42096230880. Its totient is φ = 10715403888.

The previous prime is 21941065409. The next prime is 21941065457. The reversal of 21941065448 is 84456014912.

It is a junction number, because it is equal to n+sod(n) for n = 21941065399 and 21941065408.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 31890740 + ... + 31891427.

It is an arithmetic number, because the mean of its divisors is an integer number (2631014430).

Almost surely, 2^21941065448 is an apocalyptic number.

It is an amenable number.

21941065448 is a deficient number, since it is larger than the sum of its proper divisors (20155165432).

21941065448 is a wasteful number, since it uses less digits than its factorization.

21941065448 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 63782216 (or 63782212 counting only the distinct ones).

The product of its (nonzero) digits is 276480, while the sum is 44.

The spelling of 21941065448 in words is "twenty-one billion, nine hundred forty-one million, sixty-five thousand, four hundred forty-eight".