20766794 has 4 divisors (see below), whose sum is σ = 31150194. Its totient is φ = 10383396.

The previous prime is 20766773. The next prime is 20766799. The reversal of 20766794 is 49766702.

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

It can be written as a sum of positive squares in only one way, i.e., 20748025 + 18769 = 4555^2 + 137^2 .

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (20766799) by changing a digit.

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 as a sum of consecutive naturals, namely, 5191697 + ... + 5191700.

Almost surely, 2^20766794 is an apocalyptic number.

20766794 is a deficient number, since it is larger than the sum of its proper divisors (10383400).

20766794 is a wasteful number, since it uses less digits than its factorization.

20766794 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10383399.

The product of its (nonzero) digits is 127008, while the sum is 41.

The square root of 20766794 is about 4557.0597977205. The cubic root of 20766794 is about 274.8673475927.

The spelling of 20766794 in words is "twenty million, seven hundred sixty-six thousand, seven hundred ninety-four".