21134543530 has 8 divisors (see below), whose sum is σ = 38042178372. Its totient is φ = 8453817408.

The previous prime is 21134543453. The next prime is 21134543557. The reversal of 21134543530 is 3534543112.

21134543530 is digitally balanced in base 5, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 20051409609 + 1083133921 = 141603^2 + 32911^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a junction number, because it is equal to n+sod(n) for n = 21134543492 and 21134543501.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1056727167 + ... + 1056727186.

Almost surely, 2^21134543530 is an apocalyptic number.

21134543530 is a deficient number, since it is larger than the sum of its proper divisors (16907634842).

21134543530 is a wasteful number, since it uses less digits than its factorization.

21134543530 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2113454360.

The product of its (nonzero) digits is 21600, while the sum is 31.

The spelling of 21134543530 in words is "twenty-one billion, one hundred thirty-four million, five hundred forty-three thousand, five hundred thirty".