20790766 has 4 divisors (see below), whose sum is σ = 31186152. Its totient is φ = 10395382.

The previous prime is 20790761. The next prime is 20790773. The reversal of 20790766 is 66709702.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20790761) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5197690 + ... + 5197693.

It is an arithmetic number, because the mean of its divisors is an integer number (7796538).

Almost surely, 2^20790766 is an apocalyptic number.

20790766 is a deficient number, since it is larger than the sum of its proper divisors (10395386).

20790766 is a wasteful number, since it uses less digits than its factorization.

20790766 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10395385.

The product of its (nonzero) digits is 31752, while the sum is 37.

The square root of 20790766 is about 4559.6892437972. The cubic root of 20790766 is about 274.9730706413.

The spelling of 20790766 in words is "twenty million, seven hundred ninety thousand, seven hundred sixty-six".