20004293 has 4 divisors (see below), whose sum is σ = 20138700. Its totient is φ = 19869888.

The previous prime is 20004289. The next prime is 20004307. The reversal of 20004293 is 39240002.

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

It can be written as a sum of positive squares in 2 ways, for example, as 1151329 + 18852964 = 1073^2 + 4342^2 .

It is a cyclic number.

It is not a de Polignac number, because 20004293 - 2² = 20004289 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20004233) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 66980 + ... + 67277.

It is an arithmetic number, because the mean of its divisors is an integer number (5034675).

Almost surely, 2^20004293 is an apocalyptic number.

It is an amenable number.

20004293 is a deficient number, since it is larger than the sum of its proper divisors (134407).

20004293 is a wasteful number, since it uses less digits than its factorization.

20004293 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 134406.

The product of its (nonzero) digits is 432, while the sum is 20.

The square root of 20004293 is about 4472.6159012372. The cubic root of 20004293 is about 271.4611819281.

Adding to 20004293 its reverse (39240002), we get a palindrome (59244295).

The spelling of 20004293 in words is "twenty million, four thousand, two hundred ninety-three".