20202563 has 8 divisors (see below), whose sum is σ = 20487600. Its totient is φ = 19919520.

The previous prime is 20202557. The next prime is 20202571. The reversal of 20202563 is 36520202.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 20202563 - 2¹⁸ = 19940419 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20202503) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 37073 + ... + 37613.

It is an arithmetic number, because the mean of its divisors is an integer number (2560950).

Almost surely, 2^20202563 is an apocalyptic number.

20202563 is a deficient number, since it is larger than the sum of its proper divisors (285037).

20202563 is a wasteful number, since it uses less digits than its factorization.

20202563 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 997.

The product of its (nonzero) digits is 720, while the sum is 20.

The square root of 20202563 is about 4494.7261318127. The cubic root of 20202563 is about 272.3550860949.

Adding to 20202563 its reverse (36520202), we get a palindrome (56722765).

The spelling of 20202563 in words is "twenty million, two hundred two thousand, five hundred sixty-three".