20306766 has 8 divisors (see below), whose sum is σ = 40613544. Its totient is φ = 6768920.

The previous prime is 20306761. The next prime is 20306771. The reversal of 20306766 is 66760302.

It is an interprime number because it is at equal distance from previous prime (20306761) and next prime (20306771).

It is a sphenic number, since it is the product of 3 distinct primes.

20306766 is an admirable number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20306761) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1692225 + ... + 1692236.

It is an arithmetic number, because the mean of its divisors is an integer number (5076693).

Almost surely, 2^20306766 is an apocalyptic number.

20306766 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20306766 is a wasteful number, since it uses less digits than its factorization.

20306766 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3384466.

The product of its (nonzero) digits is 9072, while the sum is 30.

The square root of 20306766 is about 4506.3029192454. The cubic root of 20306766 is about 272.8225443109.

The spelling of 20306766 in words is "twenty million, three hundred six thousand, seven hundred sixty-six".