20616263 has 2 divisors, whose sum is σ = 20616264. Its totient is φ = 20616262.

The previous prime is 20616229. The next prime is 20616269. The reversal of 20616263 is 36261602.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 20616263 - 2¹² = 20612167 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20616269) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10308131 + 10308132.

It is an arithmetic number, because the mean of its divisors is an integer number (10308132).

Almost surely, 2^20616263 is an apocalyptic number.

20616263 is a deficient number, since it is larger than the sum of its proper divisors (1).

20616263 is an equidigital number, since it uses as much as digits as its factorization.

20616263 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2592, while the sum is 26.

The square root of 20616263 is about 4540.5135172137. The cubic root of 20616263 is about 274.2015983101.

Adding to 20616263 its reverse (36261602), we get a palindrome (56877865).

The spelling of 20616263 in words is "twenty million, six hundred sixteen thousand, two hundred sixty-three".