20764807 has 8 divisors (see below), whose sum is σ = 24372896. Its totient is φ = 17317152.

The previous prime is 20764787. The next prime is 20764811. The reversal of 20764807 is 70846702.

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

It is a cyclic number.

It is not a de Polignac number, because 20764807 - 2¹¹ = 20762759 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20764847) by changing a digit.

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 in 7 ways as a sum of consecutive naturals, for example, 39828 + ... + 40345.

It is an arithmetic number, because the mean of its divisors is an integer number (3046612).

Almost surely, 2^20764807 is an apocalyptic number.

20764807 is a deficient number, since it is larger than the sum of its proper divisors (3608089).

20764807 is an equidigital number, since it uses as much as digits as its factorization.

20764807 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 80217.

The product of its (nonzero) digits is 18816, while the sum is 34.

The square root of 20764807 is about 4556.8417791273. The cubic root of 20764807 is about 274.8585807309.

The spelling of 20764807 in words is "twenty million, seven hundred sixty-four thousand, eight hundred seven".