20745968 has 10 divisors (see below), whose sum is σ = 40195344. Its totient is φ = 10372976.

The previous prime is 20745911. The next prime is 20745971. The reversal of 20745968 is 86954702.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 648296 + ... + 648327.

Almost surely, 2^20745968 is an apocalyptic number.

It is an amenable number.

20745968 is a deficient number, since it is larger than the sum of its proper divisors (19449376).

20745968 is a wasteful number, since it uses less digits than its factorization.

20745968 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1296631 (or 1296625 counting only the distinct ones).

The product of its (nonzero) digits is 120960, while the sum is 41.

The square root of 20745968 is about 4554.7741985745. The cubic root of 20745968 is about 274.7754331961.

The spelling of 20745968 in words is "twenty million, seven hundred forty-five thousand, nine hundred sixty-eight".