21141304 has 16 divisors (see below), whose sum is σ = 39944520. Its totient is φ = 10489440.

The previous prime is 21141299. The next prime is 21141317. The reversal of 21141304 is 40314112.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9039 + ... + 11134.

Almost surely, 2^21141304 is an apocalyptic number.

It is an amenable number.

21141304 is a deficient number, since it is larger than the sum of its proper divisors (18803216).

21141304 is a wasteful number, since it uses less digits than its factorization.

21141304 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20310 (or 20306 counting only the distinct ones).

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

The square root of 21141304 is about 4597.9673770048. The cubic root of 21141304 is about 276.5098396698.

Adding to 21141304 its reverse (40314112), we get a palindrome (61455416).

The spelling of 21141304 in words is "twenty-one million, one hundred forty-one thousand, three hundred four".