21316732567 has 16 divisors (see below), whose sum is σ = 24273141760. Its totient is φ = 18557711712.

The previous prime is 21316732441. The next prime is 21316732589. The reversal of 21316732567 is 76523761312.

It is a cyclic number.

It is not a de Polignac number, because 21316732567 - 2²⁷ = 21182514839 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21316732867) 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 15 ways as a sum of consecutive naturals, for example, 138423 + ... + 248584.

It is an arithmetic number, because the mean of its divisors is an integer number (1517071360).

Almost surely, 2^21316732567 is an apocalyptic number.

21316732567 is a deficient number, since it is larger than the sum of its proper divisors (2956409193).

21316732567 is a wasteful number, since it uses less digits than its factorization.

21316732567 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 387262.

The product of its digits is 317520, while the sum is 43.

The spelling of 21316732567 in words is "twenty-one billion, three hundred sixteen million, seven hundred thirty-two thousand, five hundred sixty-seven".