21652705831411 has 4 divisors (see below), whose sum is σ = 21689219669832. Its totient is φ = 21616191992992.

The previous prime is 21652705831409. The next prime is 21652705831453. The reversal of 21652705831411 is 11413850725612.

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 21652705831411 - 2¹ = 21652705831409 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21652705831811) 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, 18256918321 + ... + 18256919506.

It is an arithmetic number, because the mean of its divisors is an integer number (5422304917458).

Almost surely, 2^{21652705831411} is an apocalyptic number.

21652705831411 is a deficient number, since it is larger than the sum of its proper divisors (36513838421).

21652705831411 is an equidigital number, since it uses as much as digits as its factorization.

21652705831411 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36513838420.

The product of its (nonzero) digits is 403200, while the sum is 46.

The spelling of 21652705831411 in words is "twenty-one trillion, six hundred fifty-two billion, seven hundred five million, eight hundred thirty-one thousand, four hundred eleven".