21875565248 has 28 divisors (see below), whose sum is σ = 43421609880. Its totient is φ = 10934687232.

The previous prime is 21875565247. The next prime is 21875565281. The reversal of 21875565248 is 84256557812.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 21875565248.

It is not an unprimeable number, because it can be changed into a prime (21875565247) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 188543 + ... + 281601.

Almost surely, 2^21875565248 is an apocalyptic number.

It is an amenable number.

21875565248 is a deficient number, since it is larger than the sum of its proper divisors (21546044632).

21875565248 is an equidigital number, since it uses as much as digits as its factorization.

21875565248 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 96744 (or 96734 counting only the distinct ones).

The product of its digits is 5376000, while the sum is 53.

The spelling of 21875565248 in words is "twenty-one billion, eight hundred seventy-five million, five hundred sixty-five thousand, two hundred forty-eight".