21248849616 has 40 divisors (see below), whose sum is σ = 54927734400. Its totient is φ = 7078450176.

The previous prime is 21248849597. The next prime is 21248849639. The reversal of 21248849616 is 61694884212.

It is a super-2 number, since 2×21248849616² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 63841 + ... + 215808.

It is an arithmetic number, because the mean of its divisors is an integer number (1373193360).

Almost surely, 2^21248849616 is an apocalyptic number.

It is an amenable number.

21248849616 is an abundant number, since it is smaller than the sum of its proper divisors (33678884784).

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

21248849616 is a wasteful number, since it uses less digits than its factorization.

21248849616 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 281243 (or 281237 counting only the distinct ones).

The product of its digits is 1327104, while the sum is 51.

The spelling of 21248849616 in words is "twenty-one billion, two hundred forty-eight million, eight hundred forty-nine thousand, six hundred sixteen".