21244550268 has 48 divisors (see below), whose sum is σ = 50176052640. Its totient is φ = 6995180544.

The previous prime is 21244550227. The next prime is 21244550297. The reversal of 21244550268 is 86205544212.

It is a congruent number.

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 15 ways as a sum of consecutive naturals, for example, 1162530 + ... + 1180662.

It is an arithmetic number, because the mean of its divisors is an integer number (1045334430).

Almost surely, 2^21244550268 is an apocalyptic number.

It is an amenable number.

21244550268 is an abundant number, since it is smaller than the sum of its proper divisors (28931502372).

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

21244550268 is a wasteful number, since it uses less digits than its factorization.

21244550268 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19326 (or 19324 counting only the distinct ones).

The product of its (nonzero) digits is 153600, while the sum is 39.

The spelling of 21244550268 in words is "twenty-one billion, two hundred forty-four million, five hundred fifty thousand, two hundred sixty-eight".