21104230 has 16 divisors (see below), whose sum is σ = 43414560. Its totient is φ = 7235712.

The previous prime is 21104221. The next prime is 21104233. The reversal of 21104230 is 3240112.

It is a self number, because there is not a number n which added to its sum of digits gives 21104230.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21104233) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 150675 + ... + 150814.

It is an arithmetic number, because the mean of its divisors is an integer number (2713410).

Almost surely, 2^21104230 is an apocalyptic number.

21104230 is an abundant number, since it is smaller than the sum of its proper divisors (22310330).

21104230 is a wasteful number, since it uses less digits than its factorization.

21104230 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 301503.

The product of its (nonzero) digits is 48, while the sum is 13.

The square root of 21104230 is about 4593.9340439323. The cubic root of 21104230 is about 276.3481132222.

Adding to 21104230 its reverse (3240112), we get a palindrome (24344342).

The spelling of 21104230 in words is "twenty-one million, one hundred four thousand, two hundred thirty".