21463204 has 12 divisors (see below), whose sum is σ = 42926464. Its totient is φ = 9198504.

The previous prime is 21463201. The next prime is 21463223. The reversal of 21463204 is 40236412.

It is a happy number.

21463204 is an admirable number.

It is not an unprimeable number, because it can be changed into a prime (21463201) 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, 383244 + ... + 383299.

Almost surely, 2^21463204 is an apocalyptic number.

It is an amenable number.

21463204 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21463204 is a wasteful number, since it uses less digits than its factorization.

21463204 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 766554 (or 766552 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 22.

The square root of 21463204 is about 4632.8397338997. The cubic root of 21463204 is about 277.9061671143.

Adding to 21463204 its reverse (40236412), we get a palindrome (61699616).

The spelling of 21463204 in words is "twenty-one million, four hundred sixty-three thousand, two hundred four".