21160416724 has 12 divisors (see below), whose sum is σ = 37063889044. Its totient is φ = 10570734144.

The previous prime is 21160416721. The next prime is 21160416731. The reversal of 21160416724 is 42761406112.

It can be written as a sum of positive squares in 2 ways, for example, as 5204179600 + 15956237124 = 72140^2 + 126318^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 21160416724.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21160416721) 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 3 ways as a sum of consecutive naturals, for example, 2363529 + ... + 2372464.

Almost surely, 2^21160416724 is an apocalyptic number.

It is an amenable number.

21160416724 is a deficient number, since it is larger than the sum of its proper divisors (15903472320).

21160416724 is a wasteful number, since it uses less digits than its factorization.

21160416724 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4737114 (or 4737112 counting only the distinct ones).

The product of its (nonzero) digits is 16128, while the sum is 34.

The spelling of 21160416724 in words is "twenty-one billion, one hundred sixty million, four hundred sixteen thousand, seven hundred twenty-four".