21030322 has 8 divisors (see below), whose sum is σ = 31776156. Its totient is φ = 10438272.

The previous prime is 21030313. The next prime is 21030329. The reversal of 21030322 is 22303012.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 19368801 + 1661521 = 4401^2 + 1289^2 .

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

It is not an unprimeable number, because it can be changed into a prime (21030329) by changing a digit.

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, 38103 + ... + 38650.

Almost surely, 2^21030322 is an apocalyptic number.

21030322 is a deficient number, since it is larger than the sum of its proper divisors (10745834).

21030322 is a wasteful number, since it uses less digits than its factorization.

21030322 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 76892.

The product of its (nonzero) digits is 72, while the sum is 13.

The square root of 21030322 is about 4585.8829029970. The cubic root of 21030322 is about 276.0251412370.

Adding to 21030322 its reverse (22303012), we get a palindrome (43333334).

The spelling of 21030322 in words is "twenty-one million, thirty thousand, three hundred twenty-two".