21002330 has 16 divisors (see below), whose sum is σ = 37873440. Its totient is φ = 8385552.

The previous prime is 21002329. The next prime is 21002341. The reversal of 21002330 is 3320012.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4997 + ... + 8183.

It is an arithmetic number, because the mean of its divisors is an integer number (2367090).

Almost surely, 2^21002330 is an apocalyptic number.

21002330 is a deficient number, since it is larger than the sum of its proper divisors (16871110).

21002330 is a wasteful number, since it uses less digits than its factorization.

21002330 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3853.

The product of its (nonzero) digits is 36, while the sum is 11.

The square root of 21002330 is about 4582.8299117467. The cubic root of 21002330 is about 275.9026209010.

Adding to 21002330 its reverse (3320012), we get a palindrome (24322342).

The spelling of 21002330 in words is "twenty-one million, two thousand, three hundred thirty".