20703563 has 2 divisors, whose sum is σ = 20703564. Its totient is φ = 20703562.

The previous prime is 20703541. The next prime is 20703589. The reversal of 20703563 is 36530702.

It is an a-pointer prime, because the next prime (20703589) can be obtained adding 20703563 to its sum of digits (26).

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 20703563 - 2⁸ = 20703307 is a prime.

It is not a weakly prime, because it can be changed into another prime (20703503) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10351781 + 10351782.

It is an arithmetic number, because the mean of its divisors is an integer number (10351782).

Almost surely, 2^20703563 is an apocalyptic number.

20703563 is a deficient number, since it is larger than the sum of its proper divisors (1).

20703563 is an equidigital number, since it uses as much as digits as its factorization.

20703563 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3780, while the sum is 26.

The square root of 20703563 is about 4550.1168116874. The cubic root of 20703563 is about 274.5880907671.

The spelling of 20703563 in words is "twenty million, seven hundred three thousand, five hundred sixty-three".