21342301224 has 64 divisors (see below), whose sum is σ = 55330055040. Its totient is φ = 6854595840.

The previous prime is 21342301223. The next prime is 21342301259. The reversal of 21342301224 is 42210324312.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a junction number, because it is equal to n+sod(n) for n = 21342301194 and 21342301203.

It is not an unprimeable number, because it can be changed into a prime (21342301223) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 25207 + ... + 208134.

It is an arithmetic number, because the mean of its divisors is an integer number (864532110).

Almost surely, 2^21342301224 is an apocalyptic number.

21342301224 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 21342301224, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (27665027520).

21342301224 is an abundant number, since it is smaller than the sum of its proper divisors (33987753816).

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

21342301224 is a wasteful number, since it uses less digits than its factorization.

21342301224 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 233490 (or 233486 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 24.

Adding to 21342301224 its reverse (42210324312), we get a palindrome (63552625536).

The spelling of 21342301224 in words is "twenty-one billion, three hundred forty-two million, three hundred one thousand, two hundred twenty-four".