21613360536727 has 4 divisors (see below), whose sum is σ = 22197505416136. Its totient is φ = 21029215657320.

The previous prime is 21613360536707. The next prime is 21613360536751. The reversal of 21613360536727 is 72763506331612.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21613360536727 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 (21613360536707) 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, 292072439649 + ... + 292072439722.

It is an arithmetic number, because the mean of its divisors is an integer number (5549376354034).

Almost surely, 2^{21613360536727} is an apocalyptic number.

21613360536727 is a deficient number, since it is larger than the sum of its proper divisors (584144879409).

21613360536727 is an equidigital number, since it uses as much as digits as its factorization.

21613360536727 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 584144879408.

The product of its (nonzero) digits is 5715360, while the sum is 52.

The spelling of 21613360536727 in words is "twenty-one trillion, six hundred thirteen billion, three hundred sixty million, five hundred thirty-six thousand, seven hundred twenty-seven".