20081263 has 2 divisors, whose sum is σ = 20081264. Its totient is φ = 20081262.

The previous prime is 20081227. The next prime is 20081291. The reversal of 20081263 is 36218002.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 20081263 - 2¹³ = 20073071 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20081203) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10040631 + 10040632.

It is an arithmetic number, because the mean of its divisors is an integer number (10040632).

Almost surely, 2^20081263 is an apocalyptic number.

20081263 is a deficient number, since it is larger than the sum of its proper divisors (1).

20081263 is an equidigital number, since it uses as much as digits as its factorization.

20081263 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 576, while the sum is 22.

The square root of 20081263 is about 4481.2122243875. The cubic root of 20081263 is about 271.8089010580.

Adding to 20081263 its reverse (36218002), we get a palindrome (56299265).

The spelling of 20081263 in words is "twenty million, eighty-one thousand, two hundred sixty-three".