21343304 has 16 divisors (see below), whose sum is σ = 41399100. Its totient is φ = 10303552.

The previous prime is 21343261. The next prime is 21343307. The reversal of 21343304 is 40334312.

It can be written as a sum of positive squares in 2 ways, for example, as 21252100 + 91204 = 4610^2 + 302^2 .

It is not an unprimeable number, because it can be changed into a prime (21343307) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 45767 + ... + 46230.

Almost surely, 2^21343304 is an apocalyptic number.

It is an amenable number.

21343304 is a deficient number, since it is larger than the sum of its proper divisors (20055796).

21343304 is a wasteful number, since it uses less digits than its factorization.

21343304 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 92032 (or 92028 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 20.

The square root of 21343304 is about 4619.8813837587. The cubic root of 21343304 is about 277.3877109740.

Adding to 21343304 its reverse (40334312), we get a palindrome (61677616).

The spelling of 21343304 in words is "twenty-one million, three hundred forty-three thousand, three hundred four".