21203616163 has 8 divisors (see below), whose sum is σ = 22498970832. Its totient is φ = 19913604096.

The previous prime is 21203616121. The next prime is 21203616167. The reversal of 21203616163 is 36161630212.

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

It is a cyclic number.

It is not a de Polignac number, because 21203616163 - 2⁹ = 21203615651 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21203616167) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1327470 + ... + 1343347.

It is an arithmetic number, because the mean of its divisors is an integer number (2812371354).

Almost surely, 2^21203616163 is an apocalyptic number.

21203616163 is a deficient number, since it is larger than the sum of its proper divisors (1295354669).

21203616163 is a wasteful number, since it uses less digits than its factorization.

21203616163 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2671301.

The product of its (nonzero) digits is 7776, while the sum is 31.

The spelling of 21203616163 in words is "twenty-one billion, two hundred three million, six hundred sixteen thousand, one hundred sixty-three".