21163316727 has 12 divisors (see below), whose sum is σ = 32824736376. Its totient is φ = 12093323760.

The previous prime is 21163316719. The next prime is 21163316743. The reversal of 21163316727 is 72761336112.

It is not a de Polignac number, because 21163316727 - 2³ = 21163316719 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21163316627) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 71983924 + ... + 71984217.

It is an arithmetic number, because the mean of its divisors is an integer number (2735394698).

Almost surely, 2^21163316727 is an apocalyptic number.

21163316727 is a deficient number, since it is larger than the sum of its proper divisors (11661419649).

21163316727 is a wasteful number, since it uses less digits than its factorization.

21163316727 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 143968158 (or 143968151 counting only the distinct ones).

The product of its digits is 63504, while the sum is 39.

The spelling of 21163316727 in words is "twenty-one billion, one hundred sixty-three million, three hundred sixteen thousand, seven hundred twenty-seven".