20704735 has 4 divisors (see below), whose sum is σ = 24845688. Its totient is φ = 16563784.

The previous prime is 20704729. The next prime is 20704763. The reversal of 20704735 is 53740702.

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

It is a cyclic number.

It is not a de Polignac number, because 20704735 - 2³ = 20704727 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2070469 + ... + 2070478.

It is an arithmetic number, because the mean of its divisors is an integer number (6211422).

Almost surely, 2^20704735 is an apocalyptic number.

20704735 is a deficient number, since it is larger than the sum of its proper divisors (4140953).

20704735 is an equidigital number, since it uses as much as digits as its factorization.

20704735 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4140952.

The product of its (nonzero) digits is 5880, while the sum is 28.

The square root of 20704735 is about 4550.2455977672. The cubic root of 20704735 is about 274.5932720197.

The spelling of 20704735 in words is "twenty million, seven hundred four thousand, seven hundred thirty-five".