21344032230 has 32 divisors (see below), whose sum is σ = 51508705248. Its totient is φ = 5660294400.

The previous prime is 21344032201. The next prime is 21344032231. The reversal of 21344032230 is 3223044312.

It is a self number, because there is not a number n which added to its sum of digits gives 21344032230.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21344032231) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 1959951 + ... + 1970810.

It is an arithmetic number, because the mean of its divisors is an integer number (1609647039).

Almost surely, 2^21344032230 is an apocalyptic number.

21344032230 is an abundant number, since it is smaller than the sum of its proper divisors (30164673018).

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

21344032230 is a wasteful number, since it uses less digits than its factorization.

21344032230 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3930952.

The product of its (nonzero) digits is 3456, while the sum is 24.

Adding to 21344032230 its reverse (3223044312), we get a palindrome (24567076542).

The spelling of 21344032230 in words is "twenty-one billion, three hundred forty-four million, thirty-two thousand, two hundred thirty".