20804343 has 32 divisors (see below), whose sum is σ = 33019392. Its totient is φ = 11404800.

The previous prime is 20804309. The next prime is 20804369. The reversal of 20804343 is 34340802.

It is not a de Polignac number, because 20804343 - 2⁸ = 20804087 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20800343) 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 31 ways as a sum of consecutive naturals, for example, 62688 + ... + 63018.

It is an arithmetic number, because the mean of its divisors is an integer number (1031856).

Almost surely, 2^20804343 is an apocalyptic number.

20804343 is a deficient number, since it is larger than the sum of its proper divisors (12215049).

20804343 is a wasteful number, since it uses less digits than its factorization.

20804343 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 455.

The product of its (nonzero) digits is 2304, while the sum is 24.

The square root of 20804343 is about 4561.1778084175. The cubic root of 20804343 is about 275.0329128651.

The spelling of 20804343 in words is "twenty million, eight hundred four thousand, three hundred forty-three".