21330030312 has 48 divisors (see below), whose sum is σ = 57838847040. Its totient is φ = 7101392928.

The previous prime is 21330030289. The next prime is 21330030343. The reversal of 21330030312 is 21303003312.

21330030312 is a `hidden beast` number, since 21 + 3 + 300 + 30 + 312 = 666.

It is a super-2 number, since 2×21330030312² (a number of 21 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 119568 + ... + 238655.

It is an arithmetic number, because the mean of its divisors is an integer number (1204975980).

Almost surely, 2^21330030312 is an apocalyptic number.

It is an amenable number.

21330030312 is an abundant number, since it is smaller than the sum of its proper divisors (36508816728).

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

21330030312 is a wasteful number, since it uses less digits than its factorization.

21330030312 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 359062 (or 359055 counting only the distinct ones).

The product of its (nonzero) digits is 324, while the sum is 18.

Adding to 21330030312 its reverse (21303003312), we get a palindrome (42633033624).

The spelling of 21330030312 in words is "twenty-one billion, three hundred thirty million, thirty thousand, three hundred twelve".