20263663 has 16 divisors (see below), whose sum is σ = 24137280. Its totient is φ = 16644096.

The previous prime is 20263657. The next prime is 20263673. The reversal of 20263663 is 36636202.

It is not a de Polignac number, because 20263663 - 2⁵ = 20263631 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20263603) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 34831 + ... + 35407.

It is an arithmetic number, because the mean of its divisors is an integer number (1508580).

Almost surely, 2^20263663 is an apocalyptic number.

20263663 is a deficient number, since it is larger than the sum of its proper divisors (3873617).

20263663 is a wasteful number, since it uses less digits than its factorization.

20263663 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 786.

The product of its (nonzero) digits is 7776, while the sum is 28.

The square root of 20263663 is about 4501.5178551240. The cubic root of 20263663 is about 272.6293771642.

Adding to 20263663 its reverse (36636202), we get a palindrome (56899865).

The spelling of 20263663 in words is "twenty million, two hundred sixty-three thousand, six hundred sixty-three".