20650783 has 2 divisors, whose sum is σ = 20650784. Its totient is φ = 20650782.

The previous prime is 20650771. The next prime is 20650787. The reversal of 20650783 is 38705602.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 20650783 - 2¹³ = 20642591 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20650787) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10325391 + 10325392.

It is an arithmetic number, because the mean of its divisors is an integer number (10325392).

Almost surely, 2^20650783 is an apocalyptic number.

20650783 is a deficient number, since it is larger than the sum of its proper divisors (1).

20650783 is an equidigital number, since it uses as much as digits as its factorization.

20650783 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 10080, while the sum is 31.

The square root of 20650783 is about 4544.3132594486. The cubic root of 20650783 is about 274.3545545965.

The spelling of 20650783 in words is "twenty million, six hundred fifty thousand, seven hundred eighty-three".