21163385219 has 4 divisors (see below), whose sum is σ = 21303540240. Its totient is φ = 21023230200.

The previous prime is 21163385189. The next prime is 21163385227. The reversal of 21163385219 is 91258336112.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21163385219 is a prime.

It is a super-2 number, since 2×21163385219² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21163385249) 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 3 ways as a sum of consecutive naturals, for example, 70077284 + ... + 70077585.

It is an arithmetic number, because the mean of its divisors is an integer number (5325885060).

Almost surely, 2^21163385219 is an apocalyptic number.

21163385219 is a deficient number, since it is larger than the sum of its proper divisors (140155021).

21163385219 is a wasteful number, since it uses less digits than its factorization.

21163385219 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 140155020.

The product of its digits is 77760, while the sum is 41.

The spelling of 21163385219 in words is "twenty-one billion, one hundred sixty-three million, three hundred eighty-five thousand, two hundred nineteen".