21433004 has 12 divisors (see below), whose sum is σ = 37628304. Its totient is φ = 10682064.

The previous prime is 21432991. The next prime is 21433051. The reversal of 21433004 is 40033412.

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, 7184 + ... + 9719.

It is an arithmetic number, because the mean of its divisors is an integer number (3135692).

Almost surely, 2^21433004 is an apocalyptic number.

It is an amenable number.

21433004 is a deficient number, since it is larger than the sum of its proper divisors (16195300).

21433004 is a wasteful number, since it uses less digits than its factorization.

21433004 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17224 (or 17222 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 17.

The square root of 21433004 is about 4629.5792465407. The cubic root of 21433004 is about 277.7757624506.

Adding to 21433004 its reverse (40033412), we get a palindrome (61466416).

The spelling of 21433004 in words is "twenty-one million, four hundred thirty-three thousand, four".