21284940510 has 64 divisors (see below), whose sum is σ = 56820087360. Its totient is φ = 5669959680.

The previous prime is 21284940499. The next prime is 21284940529. The reversal of 21284940510 is 1504948212.

21284940510 is a `hidden beast` number, since 21 + 2 + 84 + 9 + 40 + 510 = 666.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 215950 + ... + 298670.

It is an arithmetic number, because the mean of its divisors is an integer number (887813865).

Almost surely, 2^21284940510 is an apocalyptic number.

21284940510 is an abundant number, since it is smaller than the sum of its proper divisors (35535146850).

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

21284940510 is a wasteful number, since it uses less digits than its factorization.

21284940510 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 83690 (or 83684 counting only the distinct ones).

The product of its (nonzero) digits is 23040, while the sum is 36.

The spelling of 21284940510 in words is "twenty-one billion, two hundred eighty-four million, nine hundred forty thousand, five hundred ten".