21635522741327 has 4 divisors (see below), whose sum is σ = 23602388445096. Its totient is φ = 19668657037560.

The previous prime is 21635522741279. The next prime is 21635522741333. The reversal of 21635522741327 is 72314722553612.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 21635522741327 - 2¹⁶ = 21635522675791 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 (21635522741387) 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, 983432851868 + ... + 983432851889.

It is an arithmetic number, because the mean of its divisors is an integer number (5900597111274).

Almost surely, 2^{21635522741327} is an apocalyptic number.

21635522741327 is a deficient number, since it is larger than the sum of its proper divisors (1966865703769).

21635522741327 is a wasteful number, since it uses less digits than its factorization.

21635522741327 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1966865703768.

The product of its digits is 4233600, while the sum is 50.

The spelling of 21635522741327 in words is "twenty-one trillion, six hundred thirty-five billion, five hundred twenty-two million, seven hundred forty-one thousand, three hundred twenty-seven".