21867265248 has 48 divisors (see below), whose sum is σ = 57555557136. Its totient is φ = 7269534720.

The previous prime is 21867265237. The next prime is 21867265289. The reversal of 21867265248 is 84256276812.

It is a tau number, because it is divible by the number of its divisors (48).

It is a self number, because there is not a number n which added to its sum of digits gives 21867265248.

It is a congruent number.

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 in 7 ways as a sum of consecutive naturals, for example, 269533 + ... + 341148.

It is an arithmetic number, because the mean of its divisors is an integer number (1199074107).

Almost surely, 2^21867265248 is an apocalyptic number.

It is an amenable number.

21867265248 is an abundant number, since it is smaller than the sum of its proper divisors (35688291888).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21867265248 is a wasteful number, since it uses less digits than its factorization.

21867265248 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 611067 (or 611059 counting only the distinct ones).

The product of its digits is 2580480, while the sum is 51.

The spelling of 21867265248 in words is "twenty-one billion, eight hundred sixty-seven million, two hundred sixty-five thousand, two hundred forty-eight".