21203332 has 12 divisors (see below), whose sum is σ = 38719296. Its totient is φ = 10140680.

The previous prime is 21203317. The next prime is 21203341. The reversal of 21203332 is 23330212.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 115144 + ... + 115327.

It is an arithmetic number, because the mean of its divisors is an integer number (3226608).

Almost surely, 2^21203332 is an apocalyptic number.

It is an amenable number.

21203332 is a deficient number, since it is larger than the sum of its proper divisors (17515964).

21203332 is a wasteful number, since it uses less digits than its factorization.

21203332 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 230498 (or 230496 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 16.

The square root of 21203332 is about 4604.7075911506. The cubic root of 21203332 is about 276.7799996965.

Adding to 21203332 its reverse (23330212), we get a palindrome (44533544).

The spelling of 21203332 in words is "twenty-one million, two hundred three thousand, three hundred thirty-two".