21365564200532 has 12 divisors (see below), whose sum is σ = 37391133876180. Its totient is φ = 10682383093056.

The previous prime is 21365564200531. The next prime is 21365564200553. The reversal of 21365564200532 is 23500246556312.

It can be written as a sum of positive squares in 2 ways, for example, as 1855904883856 + 19509659316676 = 1362316^2 + 4416974^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21365564200531) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 99631307 + ... + 99845522.

It is an arithmetic number, because the mean of its divisors is an integer number (3115927823015).

Almost surely, 2^{21365564200532} is an apocalyptic number.

It is an amenable number.

21365564200532 is a deficient number, since it is larger than the sum of its proper divisors (16025569675648).

21365564200532 is a wasteful number, since it uses less digits than its factorization.

21365564200532 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 199503610 (or 199503608 counting only the distinct ones).

The product of its (nonzero) digits is 1296000, while the sum is 44.

The spelling of 21365564200532 in words is "twenty-one trillion, three hundred sixty-five billion, five hundred sixty-four million, two hundred thousand, five hundred thirty-two".