21341330 has 32 divisors (see below), whose sum is σ = 40601088. Its totient is φ = 8064000.

The previous prime is 21341317. The next prime is 21341339. The reversal of 21341330 is 3314312.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 21341299 and 21341308.

It is not an unprimeable number, because it can be changed into a prime (21341339) 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, 12530 + ... + 14130.

It is an arithmetic number, because the mean of its divisors is an integer number (1268784).

Almost surely, 2^21341330 is an apocalyptic number.

21341330 is a deficient number, since it is larger than the sum of its proper divisors (19259758).

21341330 is a wasteful number, since it uses less digits than its factorization.

21341330 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1682.

The product of its (nonzero) digits is 216, while the sum is 17.

The square root of 21341330 is about 4619.6677369698. The cubic root of 21341330 is about 277.3791590299.

Adding to 21341330 its reverse (3314312), we get a palindrome (24655642).

The spelling of 21341330 in words is "twenty-one million, three hundred forty-one thousand, three hundred thirty".