20775467 has 4 divisors (see below), whose sum is σ = 20786040. Its totient is φ = 20764896.

The previous prime is 20775449. The next prime is 20775511. The reversal of 20775467 is 76457702.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 20775467 - 2⁸ = 20775211 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 20775467.

It is not an unprimeable number, because it can be changed into a prime (20775437) 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 in 3 ways as a sum of consecutive naturals, for example, 1373 + ... + 6590.

It is an arithmetic number, because the mean of its divisors is an integer number (5196510).

Almost surely, 2^20775467 is an apocalyptic number.

20775467 is a deficient number, since it is larger than the sum of its proper divisors (10573).

20775467 is an equidigital number, since it uses as much as digits as its factorization.

20775467 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10572.

The product of its (nonzero) digits is 82320, while the sum is 38.

The square root of 20775467 is about 4558.0112988013. The cubic root of 20775467 is about 274.9056072732.

The spelling of 20775467 in words is "twenty million, seven hundred seventy-five thousand, four hundred sixty-seven".