21105230163 has 8 divisors (see below), whose sum is σ = 28144829328. Its totient is φ = 14067892224.

The previous prime is 21105230101. The next prime is 21105230189. The reversal of 21105230163 is 36103250112.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 21105230163 - 2⁸ = 21105229907 is a prime.

It is not an unprimeable number, because it can be changed into a prime (21105232163) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 543406 + ... + 580947.

It is an arithmetic number, because the mean of its divisors is an integer number (3518103666).

Almost surely, 2^21105230163 is an apocalyptic number.

21105230163 is a deficient number, since it is larger than the sum of its proper divisors (7039599165).

21105230163 is a wasteful number, since it uses less digits than its factorization.

21105230163 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1130613.

The product of its (nonzero) digits is 1080, while the sum is 24.

Adding to 21105230163 its reverse (36103250112), we get a palindrome (57208480275).

The spelling of 21105230163 in words is "twenty-one billion, one hundred five million, two hundred thirty thousand, one hundred sixty-three".