20963263 has 4 divisors (see below), whose sum is σ = 20972448. Its totient is φ = 20954080.

The previous prime is 20963219. The next prime is 20963273. The reversal of 20963263 is 36236902.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 20963263 - 2¹³ = 20955071 is a prime.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20963273) 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, 1770 + ... + 6712.

It is an arithmetic number, because the mean of its divisors is an integer number (5243112).

Almost surely, 2^20963263 is an apocalyptic number.

20963263 is a deficient number, since it is larger than the sum of its proper divisors (9185).

20963263 is an equidigital number, since it uses as much as digits as its factorization.

20963263 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9184.

The product of its (nonzero) digits is 11664, while the sum is 31.

The square root of 20963263 is about 4578.5656050776. The cubic root of 20963263 is about 275.7314434197.

The spelling of 20963263 in words is "twenty million, nine hundred sixty-three thousand, two hundred sixty-three".