21324342430 has 8 divisors (see below), whose sum is σ = 38383816392. Its totient is φ = 8529736968.

The previous prime is 21324342419. The next prime is 21324342443. The reversal of 21324342430 is 3424342312.

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

It is a congruent number.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 1066217112 + ... + 1066217131.

It is an arithmetic number, because the mean of its divisors is an integer number (4797977049).

Almost surely, 2^21324342430 is an apocalyptic number.

21324342430 is a deficient number, since it is larger than the sum of its proper divisors (17059473962).

21324342430 is a wasteful number, since it uses less digits than its factorization.

21324342430 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2132434250.

The product of its (nonzero) digits is 13824, while the sum is 28.

Adding to 21324342430 its reverse (3424342312), we get a palindrome (24748684742).

The spelling of 21324342430 in words is "twenty-one billion, three hundred twenty-four million, three hundred forty-two thousand, four hundred thirty".