20766968 has 8 divisors (see below), whose sum is σ = 38938080. Its totient is φ = 10383480.

The previous prime is 20766959. The next prime is 20766973. The reversal of 20766968 is 86966702.

It is a tau number, because it is divible by the number of its divisors (8).

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, 1297928 + ... + 1297943.

It is an arithmetic number, because the mean of its divisors is an integer number (4867260).

Almost surely, 2^20766968 is an apocalyptic number.

It is an amenable number.

20766968 is a deficient number, since it is larger than the sum of its proper divisors (18171112).

20766968 is a wasteful number, since it uses less digits than its factorization.

20766968 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2595877 (or 2595873 counting only the distinct ones).

The product of its (nonzero) digits is 217728, while the sum is 44.

The square root of 20766968 is about 4557.0788889375. The cubic root of 20766968 is about 274.8681152731.

The spelling of 20766968 in words is "twenty million, seven hundred sixty-six thousand, nine hundred sixty-eight".