21396098568 has 64 divisors (see below), whose sum is σ = 59463129600. Its totient is φ = 6371043840.

The previous prime is 21396098539. The next prime is 21396098579. The reversal of 21396098568 is 86589069312.

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, 1096413 + ... + 1115756.

It is an arithmetic number, because the mean of its divisors is an integer number (929111400).

Almost surely, 2^21396098568 is an apocalyptic number.

It is an amenable number.

21396098568 is an abundant number, since it is smaller than the sum of its proper divisors (38067031032).

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

21396098568 is a wasteful number, since it uses less digits than its factorization.

21396098568 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2212222 (or 2212218 counting only the distinct ones).

The product of its (nonzero) digits is 5598720, while the sum is 57.

The spelling of 21396098568 in words is "twenty-one billion, three hundred ninety-six million, ninety-eight thousand, five hundred sixty-eight".