21104330 has 32 divisors (see below), whose sum is σ = 41537664. Its totient is φ = 7672896.

The previous prime is 21104329. The next prime is 21104333. The reversal of 21104330 is 3340112.

It is not an unprimeable number, because it can be changed into a prime (21104333) 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, 7499 + ... + 9921.

It is an arithmetic number, because the mean of its divisors is an integer number (1298052).

Almost surely, 2^21104330 is an apocalyptic number.

21104330 is a deficient number, since it is larger than the sum of its proper divisors (20433334).

21104330 is a wasteful number, since it uses less digits than its factorization.

21104330 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2510.

The product of its (nonzero) digits is 72, while the sum is 14.

The square root of 21104330 is about 4593.9449278371. The cubic root of 21104330 is about 276.3485497029.

Adding to 21104330 its reverse (3340112), we get a palindrome (24444442).

The spelling of 21104330 in words is "twenty-one million, one hundred four thousand, three hundred thirty".