21032163 has 16 divisors (see below), whose sum is σ = 32234400. Its totient is φ = 13537440.

The previous prime is 21032161. The next prime is 21032197. The reversal of 21032163 is 36123012.

It is not a de Polignac number, because 21032163 - 2¹ = 21032161 is a prime.

It is an alternating number because its digits alternate between even and odd.

It is not an unprimeable number, because it can be changed into a prime (21032161) 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, 12648 + ... + 14213.

It is an arithmetic number, because the mean of its divisors is an integer number (2014650).

Almost surely, 2^21032163 is an apocalyptic number.

21032163 is a deficient number, since it is larger than the sum of its proper divisors (11202237).

21032163 is a wasteful number, since it uses less digits than its factorization.

21032163 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26899 (or 26893 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 18.

The square root of 21032163 is about 4586.0836233109. The cubic root of 21032163 is about 276.0331954402.

Adding to 21032163 its reverse (36123012), we get a palindrome (57155175).

The spelling of 21032163 in words is "twenty-one million, thirty-two thousand, one hundred sixty-three".