21084277848 has 32 divisors (see below), whose sum is σ = 52715622960. Its totient is φ = 7027435520.

The previous prime is 21084277843. The next prime is 21084277853. The reversal of 21084277848 is 84877248012.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (21084277843) and next prime (21084277853).

It is a super-2 number, since 2×21084277848² (a number of 21 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 21084277848.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21084277843) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 268636 + ... + 338132.

Almost surely, 2^21084277848 is an apocalyptic number.

It is an amenable number.

21084277848 is an abundant number, since it is smaller than the sum of its proper divisors (31631345112).

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

21084277848 is a wasteful number, since it uses less digits than its factorization.

21084277848 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 82147 (or 82143 counting only the distinct ones).

The product of its (nonzero) digits is 1605632, while the sum is 51.

The spelling of 21084277848 in words is "twenty-one billion, eighty-four million, two hundred seventy-seven thousand, eight hundred forty-eight".