21300330 has 32 divisors (see below), whose sum is σ = 53812800. Its totient is φ = 5380992.

The previous prime is 21300319. The next prime is 21300341. The reversal of 21300330 is 3300312.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (21300319) and next prime (21300341).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 18115 + ... + 19254.

It is an arithmetic number, because the mean of its divisors is an integer number (1681650).

Almost surely, 2^21300330 is an apocalyptic number.

21300330 is an abundant number, since it is smaller than the sum of its proper divisors (32512470).

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

21300330 is a wasteful number, since it uses less digits than its factorization.

21300330 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 37398.

The product of its (nonzero) digits is 54, while the sum is 12.

The square root of 21300330 is about 4615.2280550369. The cubic root of 21300330 is about 277.2014157167.

Adding to 21300330 its reverse (3300312), we get a palindrome (24600642).

The spelling of 21300330 in words is "twenty-one million, three hundred thousand, three hundred thirty".