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20704301 = 23900187

20704301 has 4 divisors (see below), whose sum is σ = 21604512. Its totient is φ = 19804092.

The previous prime is 20704279. The next prime is 20704309. The reversal of 20704301 is 10340702.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 10340702 = 25170351.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2k-20704301 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 20704301.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20704309) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 450071 + ... + 450116.

It is an arithmetic number, because the mean of its divisors is an integer number (5401128).

Almost surely, 220704301 is an apocalyptic number.

It is an amenable number.

20704301 is a deficient number, since it is larger than the sum of its proper divisors (900211).

20704301 is an equidigital number, since it uses as much as digits as its factorization.

20704301 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 900210.

The product of its (nonzero) digits is 168, while the sum is 17.

The square root of 20704301 is about 4550.1979077838. The cubic root of 20704301 is about 274.5913533875.

The spelling of 20704301 in words is "twenty million, seven hundred four thousand, three hundred one".

Divisors: 1 23 900187 20704301