20768966 has 4 divisors (see below), whose sum is σ = 31153452. Its totient is φ = 10384482.

The previous prime is 20768953. The next prime is 20768981. The reversal of 20768966 is 66986702.

It is a semiprime because it is the product of two primes.

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, 5192240 + ... + 5192243.

It is an arithmetic number, because the mean of its divisors is an integer number (7788363).

Almost surely, 2^20768966 is an apocalyptic number.

20768966 is a deficient number, since it is larger than the sum of its proper divisors (10384486).

20768966 is a wasteful number, since it uses less digits than its factorization.

20768966 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10384485.

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

The square root of 20768966 is about 4557.2981030431. The cubic root of 20768966 is about 274.8769300551.

The spelling of 20768966 in words is "twenty million, seven hundred sixty-eight thousand, nine hundred sixty-six".