20260663 has 2 divisors, whose sum is σ = 20260664. Its totient is φ = 20260662.

The previous prime is 20260649. The next prime is 20260679. The reversal of 20260663 is 36606202.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20260663 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20260463) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10130331 + 10130332.

It is an arithmetic number, because the mean of its divisors is an integer number (10130332).

Almost surely, 2^20260663 is an apocalyptic number.

20260663 is a deficient number, since it is larger than the sum of its proper divisors (1).

20260663 is an equidigital number, since it uses as much as digits as its factorization.

20260663 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 25.

The square root of 20260663 is about 4501.1846218523. The cubic root of 20260663 is about 272.6159223988.

Adding to 20260663 its reverse (36606202), we get a palindrome (56866865).

The spelling of 20260663 in words is "twenty million, two hundred sixty thousand, six hundred sixty-three".