20800343 has 2 divisors, whose sum is σ = 20800344. Its totient is φ = 20800342.

The previous prime is 20800331. The next prime is 20800357. The reversal of 20800343 is 34300802.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 20800343 - 2¹² = 20796247 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20800313) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10400171 + 10400172.

It is an arithmetic number, because the mean of its divisors is an integer number (10400172).

Almost surely, 2^20800343 is an apocalyptic number.

20800343 is a deficient number, since it is larger than the sum of its proper divisors (1).

20800343 is an equidigital number, since it uses as much as digits as its factorization.

20800343 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 576, while the sum is 20.

The square root of 20800343 is about 4560.7393041041. The cubic root of 20800343 is about 275.0152851008.

The spelling of 20800343 in words is "twenty million, eight hundred thousand, three hundred forty-three".