20704775 has 48 divisors (see below), whose sum is σ = 33331200. Its totient is φ = 12389760.

The previous prime is 20704763. The next prime is 20704777. The reversal of 20704775 is 57740702.

It is a happy number.

It is not a de Polignac number, because 20704775 - 2¹⁶ = 20639239 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20704777) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 42986 + ... + 43464.

It is an arithmetic number, because the mean of its divisors is an integer number (694400).

Almost surely, 2^20704775 is an apocalyptic number.

20704775 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

20704775 is a deficient number, since it is larger than the sum of its proper divisors (12626425).

20704775 is a wasteful number, since it uses less digits than its factorization.

20704775 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 528 (or 523 counting only the distinct ones).

The product of its (nonzero) digits is 13720, while the sum is 32.

The square root of 20704775 is about 4550.2499931322. The cubic root of 20704775 is about 274.5934488508.

The spelling of 20704775 in words is "twenty million, seven hundred four thousand, seven hundred seventy-five".