21350364066 has 48 divisors (see below), whose sum is σ = 47131156800. Its totient is φ = 6983782560.

The previous prime is 21350364041. The next prime is 21350364121. The reversal of 21350364066 is 66046305312.

21350364066 is a `hidden beast` number, since 2 + 1 + 3 + 5 + 0 + 3 + 640 + 6 + 6 = 666.

It is a self number, because there is not a number n which added to its sum of digits gives 21350364066.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 174651 + ... + 270561.

It is an arithmetic number, because the mean of its divisors is an integer number (981899100).

Almost surely, 2^21350364066 is an apocalyptic number.

21350364066 is an abundant number, since it is smaller than the sum of its proper divisors (25780792734).

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

21350364066 is a wasteful number, since it uses less digits than its factorization.

21350364066 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 96151 (or 96148 counting only the distinct ones).

The product of its (nonzero) digits is 77760, while the sum is 36.

Adding to 21350364066 its reverse (66046305312), we get a palindrome (87396669378).

The spelling of 21350364066 in words is "twenty-one billion, three hundred fifty million, three hundred sixty-four thousand, sixty-six".