20704293 has 12 divisors (see below), whose sum is σ = 30203628. Its totient is φ = 13665600.

The previous prime is 20704279. The next prime is 20704309. The reversal of 20704293 is 39240702.

It can be written as a sum of positive squares in 2 ways, for example, as 19342404 + 1361889 = 4398^2 + 1167^2 .

It is not a de Polignac number, because 20704293 - 2⁸ = 20704037 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20704213) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 10480 + ... + 12297.

It is an arithmetic number, because the mean of its divisors is an integer number (2516969).

Almost surely, 2^20704293 is an apocalyptic number.

It is an amenable number.

20704293 is a deficient number, since it is larger than the sum of its proper divisors (9499335).

20704293 is a wasteful number, since it uses less digits than its factorization.

20704293 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22884 (or 22881 counting only the distinct ones).

The product of its (nonzero) digits is 3024, while the sum is 27.

The square root of 20704293 is about 4550.1970287011. The cubic root of 20704293 is about 274.5913180208.

Adding to 20704293 its reverse (39240702), we get a palindrome (59944995).

The spelling of 20704293 in words is "twenty million, seven hundred four thousand, two hundred ninety-three".