20163263 has 4 divisors (see below), whose sum is σ = 20287128. Its totient is φ = 20039400.

The previous prime is 20163239. The next prime is 20163271. The reversal of 20163263 is 36236102.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 20163263 - 2¹⁰ = 20162239 is a prime.

It is a Duffinian number.

It is a plaindrome in base 16.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20163223) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 61688 + ... + 62013.

It is an arithmetic number, because the mean of its divisors is an integer number (5071782).

Almost surely, 2^20163263 is an apocalyptic number.

20163263 is a deficient number, since it is larger than the sum of its proper divisors (123865).

20163263 is a wasteful number, since it uses less digits than its factorization.

20163263 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 123864.

The product of its (nonzero) digits is 1296, while the sum is 23.

The square root of 20163263 is about 4490.3522133570. The cubic root of 20163263 is about 272.1783675448.

Adding to 20163263 its reverse (36236102), we get a palindrome (56399365).

The spelling of 20163263 in words is "twenty million, one hundred sixty-three thousand, two hundred sixty-three".