20744163 has 24 divisors (see below), whose sum is σ = 32840496. Its totient is φ = 12513600.

The previous prime is 20744111. The next prime is 20744167. The reversal of 20744163 is 36144702.

It is not a de Polignac number, because 20744163 - 2⁹ = 20743651 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20744167) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 31053 + ... + 31713.

It is an arithmetic number, because the mean of its divisors is an integer number (1368354).

Almost surely, 2^20744163 is an apocalyptic number.

20744163 is a deficient number, since it is larger than the sum of its proper divisors (12096333).

20744163 is a wasteful number, since it uses less digits than its factorization.

20744163 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 995 (or 992 counting only the distinct ones).

The product of its (nonzero) digits is 4032, while the sum is 27.

The square root of 20744163 is about 4554.5760505233. The cubic root of 20744163 is about 274.7674640325.

Adding to 20744163 its reverse (36144702), we get a palindrome (56888865).

The spelling of 20744163 in words is "twenty million, seven hundred forty-four thousand, one hundred sixty-three".