21343222230 has 64 divisors (see below), whose sum is σ = 56587852800. Its totient is φ = 5108613120.

The previous prime is 21343222207. The next prime is 21343222231. The reversal of 21343222230 is 3222234312.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 21343222230.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21343222231) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 383275 + ... + 435414.

It is an arithmetic number, because the mean of its divisors is an integer number (884185200).

Almost surely, 2^21343222230 is an apocalyptic number.

21343222230 is an abundant number, since it is smaller than the sum of its proper divisors (35244630570).

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

21343222230 is a wasteful number, since it uses less digits than its factorization.

21343222230 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 818789.

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

Adding to 21343222230 its reverse (3222234312), we get a palindrome (24565456542).

The spelling of 21343222230 in words is "twenty-one billion, three hundred forty-three million, two hundred twenty-two thousand, two hundred thirty".