21364721267324 has 24 divisors (see below), whose sum is σ = 37432736972400. Its totient is φ = 10669654195200.

The previous prime is 21364721267317. The next prime is 21364721267339. The reversal of 21364721267324 is 42376212746312.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 269346182 + ... + 269425490.

It is an arithmetic number, because the mean of its divisors is an integer number (1559697373850).

Almost surely, 2^{21364721267324} is an apocalyptic number.

It is an amenable number.

21364721267324 is a deficient number, since it is larger than the sum of its proper divisors (16068015705076).

21364721267324 is a wasteful number, since it uses less digits than its factorization.

21364721267324 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 158573 (or 158571 counting only the distinct ones).

The product of its digits is 4064256, while the sum is 50.

The spelling of 21364721267324 in words is "twenty-one trillion, three hundred sixty-four billion, seven hundred twenty-one million, two hundred sixty-seven thousand, three hundred twenty-four".