21045322 has 8 divisors (see below), whose sum is σ = 32940576. Its totient is φ = 10065132.

The previous prime is 21045319. The next prime is 21045377. The reversal of 21045322 is 22354012.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a self number, because there is not a number n which added to its sum of digits gives 21045322.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 228708 + ... + 228799.

It is an arithmetic number, because the mean of its divisors is an integer number (4117572).

Almost surely, 2^21045322 is an apocalyptic number.

21045322 is a deficient number, since it is larger than the sum of its proper divisors (11895254).

21045322 is a wasteful number, since it uses less digits than its factorization.

21045322 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 457532.

The product of its (nonzero) digits is 480, while the sum is 19.

The square root of 21045322 is about 4587.5180653595. The cubic root of 21045322 is about 276.0907511554.

Adding to 21045322 its reverse (22354012), we get a palindrome (43399334).

The spelling of 21045322 in words is "twenty-one million, forty-five thousand, three hundred twenty-two".