21241330 has 64 divisors (see below), whose sum is σ = 45505152. Its totient is φ = 7050240.

The previous prime is 21241327. The next prime is 21241331. The reversal of 21241330 is 3314212.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (21241331) 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, 69037 + ... + 69343.

It is an arithmetic number, because the mean of its divisors is an integer number (711018).

Almost surely, 2^21241330 is an apocalyptic number.

21241330 is an abundant number, since it is smaller than the sum of its proper divisors (24263822).

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

21241330 is a wasteful number, since it uses less digits than its factorization.

21241330 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 379.

The product of its (nonzero) digits is 144, while the sum is 16.

The square root of 21241330 is about 4608.8317391721. The cubic root of 21241330 is about 276.9452380373.

Adding to 21241330 its reverse (3314212), we get a palindrome (24555542).

The spelling of 21241330 in words is "twenty-one million, two hundred forty-one thousand, three hundred thirty".