30020563 has 2 divisors, whose sum is σ = 30020564. Its totient is φ = 30020562.
The previous prime is 30020561. The next prime is 30020581. The reversal of 30020563 is 36502003.
It is a weak prime.
It is a cyclic number.
It is not a de Polignac number, because 30020563 - 21 = 30020561 is a prime.
Together with 30020561, it forms a pair of twin primes.
It is a self number, because there is not a number n which added to its sum of digits gives 30020563.
It is not a weakly prime, because it can be changed into another prime (30020561) by changing a digit.
It is a pernicious number, because its binary representation contains a prime number (13) of ones.
It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15010281 + 15010282.
It is an arithmetic number, because the mean of its divisors is an integer number (15010282).
Almost surely, 230020563 is an apocalyptic number.
30020563 is a deficient number, since it is larger than the sum of its proper divisors (1).
30020563 is an equidigital number, since it uses as much as digits as its factorization.
30020563 is an odious number, because the sum of its binary digits is odd.
The product of its (nonzero) digits is 540, while the sum is 19.
The square root of 30020563 is about 5479.1023899905. The cubic root of 30020563 is about 310.7942277390.
Adding to 30020563 its reverse (36502003), we get a palindrome (66522566).
The spelling of 30020563 in words is "thirty million, twenty thousand, five hundred sixty-three".
• e-mail: info -at- numbersaplenty.com • Privacy notice • done in 0.062 sec. • engine limits •