20704233 has 16 divisors (see below), whose sum is σ = 30191616. Its totient is φ = 12516240.

The previous prime is 20704219. The next prime is 20704253. The reversal of 20704233 is 33240702.

It is a happy number.

It is not a de Polignac number, because 20704233 - 2⁴ = 20704217 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20704213) 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 15 ways as a sum of consecutive naturals, for example, 23560 + ... + 24422.

It is an arithmetic number, because the mean of its divisors is an integer number (1886976).

Almost surely, 2^20704233 is an apocalyptic number.

It is an amenable number.

20704233 is a deficient number, since it is larger than the sum of its proper divisors (9487383).

20704233 is a wasteful number, since it uses less digits than its factorization.

20704233 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1604.

The product of its (nonzero) digits is 1008, while the sum is 21.

The square root of 20704233 is about 4550.1904355752. The cubic root of 20704233 is about 274.5910527699.

Adding to 20704233 its reverse (33240702), we get a palindrome (53944935).

It can be divided in two parts, 207042 and 33, that multiplied together give a palindrome (6832386).

The spelling of 20704233 in words is "twenty million, seven hundred four thousand, two hundred thirty-three".