20840683 has 2 divisors, whose sum is σ = 20840684. Its totient is φ = 20840682.

The previous prime is 20840653. The next prime is 20840707. The reversal of 20840683 is 38604802.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 20840683 - 2¹³ = 20832491 is a prime.

It is not a weakly prime, because it can be changed into another prime (20840653) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10420341 + 10420342.

It is an arithmetic number, because the mean of its divisors is an integer number (10420342).

Almost surely, 2^20840683 is an apocalyptic number.

20840683 is a deficient number, since it is larger than the sum of its proper divisors (1).

20840683 is an equidigital number, since it uses as much as digits as its factorization.

20840683 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 9216, while the sum is 31.

The square root of 20840683 is about 4565.1596905256. The cubic root of 20840683 is about 275.1929576898.

The spelling of 20840683 in words is "twenty million, eight hundred forty thousand, six hundred eighty-three".