21208460848 has 20 divisors (see below), whose sum is σ = 41108426928. Its totient is φ = 10599834560.

The previous prime is 21208460831. The next prime is 21208460849. The reversal of 21208460848 is 84806480212.

It is a super-2 number, since 2×21208460848² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (21208460849) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 234763 + ... + 312298.

Almost surely, 2^21208460848 is an apocalyptic number.

It is an amenable number.

21208460848 is a deficient number, since it is larger than the sum of its proper divisors (19899966080).

21208460848 is a wasteful number, since it uses less digits than its factorization.

21208460848 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 549492 (or 549486 counting only the distinct ones).

The product of its (nonzero) digits is 196608, while the sum is 43.

The spelling of 21208460848 in words is "twenty-one billion, two hundred eight million, four hundred sixty thousand, eight hundred forty-eight".