21652534530 has 192 divisors, whose sum is σ = 62793843840. Its totient is φ = 5132544000.

The previous prime is 21652534471. The next prime is 21652534543. The reversal of 21652534530 is 3543525612.

21652534530 is a `hidden beast` number, since 21 + 6 + 52 + 53 + 4 + 530 = 666.

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 8297866 + ... + 8300474.

It is an arithmetic number, because the mean of its divisors is an integer number (327051270).

Almost surely, 2^21652534530 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 21652534530, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (31396921920).

21652534530 is an abundant number, since it is smaller than the sum of its proper divisors (41141309310).

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

21652534530 is a wasteful number, since it uses less digits than its factorization.

21652534530 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2817 (or 2814 counting only the distinct ones).

The product of its (nonzero) digits is 108000, while the sum is 36.

The spelling of 21652534530 in words is "twenty-one billion, six hundred fifty-two million, five hundred thirty-four thousand, five hundred thirty".