20680043 has 2 divisors, whose sum is σ = 20680044. Its totient is φ = 20680042.

The previous prime is 20680039. The next prime is 20680063. The reversal of 20680043 is 34008602.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 20680043 - 2² = 20680039 is a prime.

It is not a weakly prime, because it can be changed into another prime (20680063) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10340021 + 10340022.

It is an arithmetic number, because the mean of its divisors is an integer number (10340022).

Almost surely, 2^20680043 is an apocalyptic number.

20680043 is a deficient number, since it is larger than the sum of its proper divisors (1).

20680043 is an equidigital number, since it uses as much as digits as its factorization.

20680043 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1152, while the sum is 23.

The square root of 20680043 is about 4547.5315282030. The cubic root of 20680043 is about 274.4840706834.

Adding to 20680043 its reverse (34008602), we get a palindrome (54688645).

The spelling of 20680043 in words is "twenty million, six hundred eighty thousand, forty-three".