21600566250113 has 4 divisors (see below), whose sum is σ = 21600610453248. Its totient is φ = 21600522046980.

The previous prime is 21600566250083. The next prime is 21600566250139. The reversal of 21600566250113 is 31105266500612.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 21600566250113 - 2¹⁸ = 21600565987969 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21600566250143) 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, 21360281 + ... + 22348662.

It is an arithmetic number, because the mean of its divisors is an integer number (5400152613312).

Almost surely, 2^{21600566250113} is an apocalyptic number.

It is an amenable number.

21600566250113 is a deficient number, since it is larger than the sum of its proper divisors (44203135).

21600566250113 is an equidigital number, since it uses as much as digits as its factorization.

21600566250113 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 44203134.

The product of its (nonzero) digits is 64800, while the sum is 38.

The spelling of 21600566250113 in words is "twenty-one trillion, six hundred billion, five hundred sixty-six million, two hundred fifty thousand, one hundred thirteen".