21284548610 has 48 divisors (see below), whose sum is σ = 41885428536. Its totient is φ = 7741400832.

The previous prime is 21284548591. The next prime is 21284548687. The reversal of 21284548610 is 1684548212.

It can be written as a sum of positive squares in 4 ways, for example, as 12117826561 + 9166722049 = 110081^2 + 95743^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 565334 + ... + 601806.

Almost surely, 2^21284548610 is an apocalyptic number.

21284548610 is a deficient number, since it is larger than the sum of its proper divisors (20600879926).

21284548610 is a wasteful number, since it uses less digits than its factorization.

21284548610 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36627 (or 36560 counting only the distinct ones).

The product of its (nonzero) digits is 122880, while the sum is 41.

The spelling of 21284548610 in words is "twenty-one billion, two hundred eighty-four million, five hundred forty-eight thousand, six hundred ten".