21411304 has 16 divisors (see below), whose sum is σ = 40309920. Its totient is φ = 10662000.

The previous prime is 21411301. The next prime is 21411317. The reversal of 21411304 is 40311412.

It is not an unprimeable number, because it can be changed into a prime (21411301) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3324 + ... + 7339.

It is an arithmetic number, because the mean of its divisors is an integer number (2519370).

Almost surely, 2^21411304 is an apocalyptic number.

It is an amenable number.

21411304 is a deficient number, since it is larger than the sum of its proper divisors (18898616).

21411304 is a wasteful number, since it uses less digits than its factorization.

21411304 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10920 (or 10916 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 16.

The square root of 21411304 is about 4627.2350275299. The cubic root of 21411304 is about 277.6819854348.

Adding to 21411304 its reverse (40311412), we get a palindrome (61722716).

The spelling of 21411304 in words is "twenty-one million, four hundred eleven thousand, three hundred four".