21044962 has 8 divisors (see below), whose sum is σ = 31605696. Its totient is φ = 10509732.

The previous prime is 21044927. The next prime is 21044987. The reversal of 21044962 is 26944012.

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 21044962.

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, 4158 + ... + 7705.

It is an arithmetic number, because the mean of its divisors is an integer number (3950712).

Almost surely, 2^21044962 is an apocalyptic number.

21044962 is a deficient number, since it is larger than the sum of its proper divisors (10560734).

21044962 is a wasteful number, since it uses less digits than its factorization.

21044962 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12752.

The product of its (nonzero) digits is 3456, while the sum is 28.

The square root of 21044962 is about 4587.4788282890. The cubic root of 21044962 is about 276.0891768825.

Adding to 21044962 its reverse (26944012), we get a palindrome (47988974).

The spelling of 21044962 in words is "twenty-one million, forty-four thousand, nine hundred sixty-two".