21066530746 has 8 divisors (see below), whose sum is σ = 31600740960. Its totient is φ = 10532950428.

The previous prime is 21066530741. The next prime is 21066530767. The reversal of 21066530746 is 64703566012.

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 = 21066530699 and 21066530708.

It is not an unprimeable number, because it can be changed into a prime (21066530741) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 62376 + ... + 214531.

It is an arithmetic number, because the mean of its divisors is an integer number (3950092620).

Almost surely, 2^21066530746 is an apocalyptic number.

21066530746 is a deficient number, since it is larger than the sum of its proper divisors (10534210214).

21066530746 is a wasteful number, since it uses less digits than its factorization.

21066530746 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 314948.

The product of its (nonzero) digits is 181440, while the sum is 40.

The spelling of 21066530746 in words is "twenty-one billion, sixty-six million, five hundred thirty thousand, seven hundred forty-six".