20968648 has 16 divisors (see below), whose sum is σ = 40584960. Its totient is φ = 10146000.

The previous prime is 20968613. The next prime is 20968693. The reversal of 20968648 is 84686902.

It is a happy number.

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, 42028 + ... + 42523.

It is an arithmetic number, because the mean of its divisors is an integer number (2536560).

Almost surely, 2^20968648 is an apocalyptic number.

It is an amenable number.

20968648 is a deficient number, since it is larger than the sum of its proper divisors (19616312).

20968648 is a wasteful number, since it uses less digits than its factorization.

20968648 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 84588 (or 84584 counting only the distinct ones).

The product of its (nonzero) digits is 165888, while the sum is 43.

The square root of 20968648 is about 4579.1536335878. The cubic root of 20968648 is about 275.7550511743.

The spelling of 20968648 in words is "twenty million, nine hundred sixty-eight thousand, six hundred forty-eight".