21424416548 has 12 divisors (see below), whose sum is σ = 37494150540. Its totient is φ = 10711802112.

The previous prime is 21424416421. The next prime is 21424416557. The reversal of 21424416548 is 84561442412.

It can be written as a sum of positive squares in 2 ways, for example, as 2817274084 + 18607142464 = 53078^2 + 136408^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 38648 + ... + 210576.

It is an arithmetic number, because the mean of its divisors is an integer number (3124512545).

Almost surely, 2^21424416548 is an apocalyptic number.

It is an amenable number.

21424416548 is a deficient number, since it is larger than the sum of its proper divisors (16069733992).

21424416548 is a wasteful number, since it uses less digits than its factorization.

21424416548 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 203086 (or 203084 counting only the distinct ones).

The product of its digits is 245760, while the sum is 41.

The spelling of 21424416548 in words is "twenty-one billion, four hundred twenty-four million, four hundred sixteen thousand, five hundred forty-eight".