21330340430 has 96 divisors (see below), whose sum is σ = 45973204992. Its totient is φ = 7101864000.

The previous prime is 21330340417. The next prime is 21330340433. The reversal of 21330340430 is 3404303312.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 21330340396 and 21330340405.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21330340433) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 2326355 + ... + 2335505.

It is an arithmetic number, because the mean of its divisors is an integer number (478887552).

Almost surely, 2^21330340430 is an apocalyptic number.

21330340430 is an abundant number, since it is smaller than the sum of its proper divisors (24642864562).

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

21330340430 is a wasteful number, since it uses less digits than its factorization.

21330340430 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9310 (or 9303 counting only the distinct ones).

The product of its (nonzero) digits is 2592, while the sum is 23.

Adding to 21330340430 its reverse (3404303312), we get a palindrome (24734643742).

The spelling of 21330340430 in words is "twenty-one billion, three hundred thirty million, three hundred forty thousand, four hundred thirty".