21063346 has 8 divisors (see below), whose sum is σ = 31634460. Its totient is φ = 10518528.

The previous prime is 21063311. The next prime is 21063373. The reversal of 21063346 is 64336012.

It can be written as a sum of positive squares in 2 ways, for example, as 17547721 + 3515625 = 4189^2 + 1875^2 .

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 21063346.

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, 4431 + ... + 7858.

Almost surely, 2^21063346 is an apocalyptic number.

21063346 is a deficient number, since it is larger than the sum of its proper divisors (10571114).

21063346 is a wasteful number, since it uses less digits than its factorization.

21063346 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13148.

The product of its (nonzero) digits is 2592, while the sum is 25.

The square root of 21063346 is about 4589.4821058590. The cubic root of 21063346 is about 276.1695468097.

Adding to 21063346 its reverse (64336012), we get a palindrome (85399358).

The spelling of 21063346 in words is "twenty-one million, sixty-three thousand, three hundred forty-six".