20804735 has 8 divisors (see below), whose sum is σ = 28532256. Its totient is φ = 14266080.

The previous prime is 20804731. The next prime is 20804737. The reversal of 20804735 is 53740802.

It is a happy number.

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

It is not a de Polignac number, because 20804735 - 2² = 20804731 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20804698 and 20804707.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20804731) 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 in 7 ways as a sum of consecutive naturals, for example, 297176 + ... + 297245.

It is an arithmetic number, because the mean of its divisors is an integer number (3566532).

Almost surely, 2^20804735 is an apocalyptic number.

20804735 is a deficient number, since it is larger than the sum of its proper divisors (7727521).

20804735 is an equidigital number, since it uses as much as digits as its factorization.

20804735 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 594433.

The product of its (nonzero) digits is 6720, while the sum is 29.

The square root of 20804735 is about 4561.2207795721. The cubic root of 20804735 is about 275.0346402645.

The spelling of 20804735 in words is "twenty million, eight hundred four thousand, seven hundred thirty-five".